diff --git a/src/google/minidump_processor.h b/src/google/minidump_processor.h
index 9c80ee4e..31b80090 100644
--- a/src/google/minidump_processor.h
+++ b/src/google/minidump_processor.h
@@ -32,10 +32,8 @@ class MinidumpProcessor {
   ~MinidumpProcessor();
 
   // Fills in the given StackFrames vector by processing the minidump file.
-  // supplier_data is an opaque pointer which is passed to
-  // SymbolSupplier::GetSymbolFile().  Returns true on success.
-  bool Process(const string &minidump_file, void *supplier_data,
-               StackFrames *stack_frames);
+  // Returns true on success.
+  bool Process(const string &minidump_file, StackFrames *stack_frames);
 
  private:
   SymbolSupplier *supplier_;
diff --git a/src/google/symbol_supplier.h b/src/google/symbol_supplier.h
index f0a6e39c..74bddf7f 100644
--- a/src/google/symbol_supplier.h
+++ b/src/google/symbol_supplier.h
@@ -30,9 +30,7 @@ class SymbolSupplier {
   virtual ~SymbolSupplier() {}
 
   // Returns the path to the symbol file for the given module.
-  // supplier_data is passed through from MinidumpProcessor::Process().
-  virtual string GetSymbolFile(MinidumpModule *module,
-                               void *supplier_data) = 0;
+  virtual string GetSymbolFile(MinidumpModule *module) = 0;
 };
 
 }  // namespace google_airbag
diff --git a/src/processor/minidump_processor.cc b/src/processor/minidump_processor.cc
index 74e478a6..9b5f4c9f 100644
--- a/src/processor/minidump_processor.cc
+++ b/src/processor/minidump_processor.cc
@@ -26,7 +26,6 @@ MinidumpProcessor::~MinidumpProcessor() {
 }
 
 bool MinidumpProcessor::Process(const string &minidump_file,
-                                void *supplier_data,
                                 StackFrames *stack_frames) {
   Minidump dump(minidump_file);
   if (!dump.Read()) {
@@ -56,7 +55,7 @@ bool MinidumpProcessor::Process(const string &minidump_file,
 
   // TODO(bryner): figure out which StackWalker we want
   StackwalkerX86 walker(exception->GetContext(), thread_memory,
-                        dump.GetModuleList(), supplier_, supplier_data);
+                        dump.GetModuleList(), supplier_);
   walker.Walk(stack_frames);
   return true;
 }
diff --git a/src/processor/minidump_processor_unittest.cc b/src/processor/minidump_processor_unittest.cc
index b73469b5..13a58662 100644
--- a/src/processor/minidump_processor_unittest.cc
+++ b/src/processor/minidump_processor_unittest.cc
@@ -36,22 +36,10 @@ namespace google_airbag {
 
 class TestSymbolSupplier : public SymbolSupplier {
  public:
-  TestSymbolSupplier() : has_supplier_data_(false) {}
-  virtual ~TestSymbolSupplier() {}
-
-  virtual string GetSymbolFile(MinidumpModule *module, void *supplier_data);
-
-  // This member is used to test the data argument to GetSymbolFile.
-  // If the argument is correct, it's set to true.
-  bool has_supplier_data_;
+  virtual string GetSymbolFile(MinidumpModule *module);
 };
 
-string TestSymbolSupplier::GetSymbolFile(MinidumpModule *module,
-                                         void *supplier_data) {
-  if (supplier_data == &has_supplier_data_) {
-    has_supplier_data_ = true;
-  }
-
+string TestSymbolSupplier::GetSymbolFile(MinidumpModule *module) {
   if (*(module->GetName()) == "c:\\test_app.exe") {
     return string(getenv("srcdir") ? getenv("srcdir") : ".") +
       "/src/processor/testdata/minidump2.sym";
@@ -73,9 +61,7 @@ static bool RunTests() {
   string minidump_file = string(getenv("srcdir") ? getenv("srcdir") : ".") +
                          "/src/processor/testdata/minidump2.dmp";
 
-  ASSERT_TRUE(processor.Process(minidump_file,
-                                &supplier.has_supplier_data_, &stack_frames));
-  ASSERT_TRUE(supplier.has_supplier_data_);
+  ASSERT_TRUE(processor.Process(minidump_file, &stack_frames));
   ASSERT_EQ(stack_frames.size(), 4);
 
   ASSERT_EQ(stack_frames[0].module_base, 0x400000);
diff --git a/src/processor/minidump_stackwalk.cc b/src/processor/minidump_stackwalk.cc
index b6049b8b..48ce1c51 100644
--- a/src/processor/minidump_stackwalk.cc
+++ b/src/processor/minidump_stackwalk.cc
@@ -80,7 +80,7 @@ int main(int argc, char** argv) {
   }
 
   StackwalkerX86 stackwalker = StackwalkerX86(context, stack_memory,
-                                              modules, NULL, NULL);
+                                              modules, NULL);
 
   StackFrames stack;
   stackwalker.Walk(&stack);
diff --git a/src/processor/stackwalker.cc b/src/processor/stackwalker.cc
index 62386b83..69301515 100644
--- a/src/processor/stackwalker.cc
+++ b/src/processor/stackwalker.cc
@@ -34,11 +34,10 @@ using std::auto_ptr;
 
 
 Stackwalker::Stackwalker(MemoryRegion* memory, MinidumpModuleList* modules,
-                         SymbolSupplier* supplier, void* supplier_data)
+                         SymbolSupplier* supplier)
     : memory_(memory),
       modules_(modules),
-      supplier_(supplier),
-      supplier_data_(supplier_data) {
+      supplier_(supplier) {
 }
 
 
@@ -65,7 +64,7 @@ void Stackwalker::Walk(StackFrames *frames) {
         frame->module_base = module->base_address();
         if (modules_ && supplier_) {
           string symbol_file =
-            supplier_->GetSymbolFile(module, supplier_data_);
+            supplier_->GetSymbolFile(module);
           if (!symbol_file.empty()) {
             resolver.LoadModule(*(module->GetName()), symbol_file);
             resolver.FillSourceLineInfo(frame.get());
diff --git a/src/processor/stackwalker.h b/src/processor/stackwalker.h
index bfcb783a..1b1aed63 100644
--- a/src/processor/stackwalker.h
+++ b/src/processor/stackwalker.h
@@ -54,12 +54,10 @@ class Stackwalker {
   // that is used to look up which code module each stack frame is
   // associated with.  supplier is an optional caller-supplied SymbolSupplier
   // implementation.  If supplier is NULL, source line info will not be
-  // resolved.  supplier_data will be passed to the SymbolSupplier's
-  // GetSymbolFile method.
+  // resolved.
   Stackwalker(MemoryRegion* memory,
               MinidumpModuleList* modules,
-              SymbolSupplier* supplier,
-              void* supplier_data);
+              SymbolSupplier* supplier);
 
   // The stack memory to walk.  Subclasses will require this region to
   // get information from the stack.
@@ -83,9 +81,6 @@ class Stackwalker {
 
   // The optional SymbolSupplier for resolving source line info.
   SymbolSupplier* supplier_;
-
-  // Caller-supplied data to be passed to the symbol supplier
-  void* supplier_data_;
 };
 
 
diff --git a/src/processor/stackwalker_x86.cc b/src/processor/stackwalker_x86.cc
index 654cb17e..cd259181 100644
--- a/src/processor/stackwalker_x86.cc
+++ b/src/processor/stackwalker_x86.cc
@@ -29,9 +29,8 @@ namespace google_airbag {
 StackwalkerX86::StackwalkerX86(MinidumpContext*    context,
                                MemoryRegion*       memory,
                                MinidumpModuleList* modules,
-                               SymbolSupplier*     supplier,
-                               void*               supplier_data)
-    : Stackwalker(memory, modules, supplier, supplier_data),
+                               SymbolSupplier*     supplier)
+    : Stackwalker(memory, modules, supplier),
       last_frame_pointer_(0) {
   if (memory_->GetBase() + memory_->GetSize() - 1 > 0xffffffff) {
     // The x86 is a 32-bit CPU, the limits of the supplied stack are invalid.
diff --git a/src/processor/stackwalker_x86.h b/src/processor/stackwalker_x86.h
index 34be57eb..8696373c 100644
--- a/src/processor/stackwalker_x86.h
+++ b/src/processor/stackwalker_x86.h
@@ -45,8 +45,7 @@ class StackwalkerX86 : public Stackwalker {
   StackwalkerX86(MinidumpContext*    context,
                  MemoryRegion*       memory,
                  MinidumpModuleList* modules,
-                 SymbolSupplier*     supplier,
-                 void*               supplier_data);
+                 SymbolSupplier*     supplier);
 
  private:
   // Implementation of Stackwalker, using x86 context (%ebp, %eip) and