diff --git a/src/third_party/libdisasm/x86_disasm.c b/src/third_party/libdisasm/x86_disasm.c
index 04574fa0..d6b7f810 100644
--- a/src/third_party/libdisasm/x86_disasm.c
+++ b/src/third_party/libdisasm/x86_disasm.c
@@ -165,7 +165,7 @@ unsigned int x86_disasm_forward( unsigned char *buf, unsigned int buf_len,
                         if (next_addr != -1 ) {
                                 next_offset = next_addr - buf_rva;
                                 /* if offset is in this buffer... */
-                                if ( next_offset >= 0 &&
+                                if ( next_addr >= buf_rva &&
                                      next_offset < buf_len ) {
                                         /* go ahead and disassemble */
                                         count += x86_disasm_forward( buf,