diff --git a/build/makefile_base.mak b/build/makefile_base.mak
index e338b3bc..74b8df64 100644
--- a/build/makefile_base.mak
+++ b/build/makefile_base.mak
@@ -648,7 +648,7 @@ $(DIST_WINEOPENXR_JSON64): $(WINEOPENXR_SRC)/wineopenxr64.json dist_prefix
 
 STEAMEXE_CFLAGS = -Wno-attributes
 STEAMEXE_CXXFLAGS = -Wno-attributes
-STEAMEXE_LDFLAGS = -lsteam_api -lole32 -ldl -static-libgcc -static-libstdc++
+STEAMEXE_LDFLAGS = -L$(STEAMEXE_SRC)/32/ -L$(STEAMEXE_SRC)/64/ -lsteam_api -lole32 -ldl -static-libgcc -static-libstdc++
 
 STEAMEXE_WINEMAKER_ARGS = \
 	"-I$(SRC)/lsteamclient/steamworks_sdk_142/" \
@@ -658,10 +658,15 @@ STEAMEXE_WINEMAKER_ARGS = \
 STEAMEXE_DEPENDS = wine
 
 $(eval $(call rules-source,steamexe,$(SRCDIR)/steam_helper))
+$(eval $(call rules-winemaker,steamexe,64,steam.exe))
 $(eval $(call rules-winemaker,steamexe,32,steam.exe))
 
 $(OBJ)/.steamexe-post-build32:
-	cp $(STEAMEXE_SRC)/libsteam_api.so $(DST_LIBDIR32)/
+	cp $(STEAMEXE_SRC)/32/libsteam_api.so $(DST_LIBDIR32)/
+	touch $@
+
+$(OBJ)/.steamexe-post-build64:
+	cp $(STEAMEXE_SRC)/64/libsteam_api.so $(DST_LIBDIR64)/
 	touch $@
 
 
diff --git a/proton b/proton
index c0a101fb..378d4304 100755
--- a/proton
+++ b/proton
@@ -290,6 +290,7 @@ class Proton:
         self.default_pfx_dir = self.path("dist/share/default_pfx/")
         self.user_settings_file = self.path("user_settings.py")
         self.wine_bin = self.bin_dir + "wine"
+        self.wine64_bin = self.bin_dir + "wine64"
         self.wineserver_bin = self.bin_dir + "wineserver"
         self.dist_lock = FileLock(self.path("dist.lock"), timeout=-1)
 
@@ -1226,7 +1227,7 @@ class Session:
                     f.write(" \"" + arg + "\"")
             f.write(")\n")
             self.dump_dbg_env(f)
-            f.write("\t\"" + g_proton.wine_bin + "\" steam.exe \"${@:-${DEF_CMD[@]}}\"\n")
+            f.write("\t\"" + g_proton.wine64_bin + "\" steam.exe \"${@:-${DEF_CMD[@]}}\"\n")
         os.chmod(tmpdir + "run", 0o755)
 
     def run_proc(self, args, local_env=None):
@@ -1247,7 +1248,7 @@ class Session:
         else:
             remote_debug_proc = None
 
-        rc = self.run_proc([g_proton.wine_bin, "steam"] + sys.argv[2:] + self.cmdlineappend)
+        rc = self.run_proc([g_proton.wine64_bin, "steam"] + sys.argv[2:] + self.cmdlineappend)
 
         if remote_debug_proc:
             remote_debug_proc.kill()
diff --git a/steam_helper/libsteam_api.so b/steam_helper/32/libsteam_api.so
similarity index 100%
rename from steam_helper/libsteam_api.so
rename to steam_helper/32/libsteam_api.so
diff --git a/steam_helper/64/libsteam_api.so b/steam_helper/64/libsteam_api.so
new file mode 100755
index 00000000..edcda830
Binary files /dev/null and b/steam_helper/64/libsteam_api.so differ