diff --git a/overlay/overlay-shared.pro b/overlay/overlay-shared.pro
index 214b9804f..8de618d3c 100644
--- a/overlay/overlay-shared.pro
+++ b/overlay/overlay-shared.pro
@@ -50,7 +50,11 @@ CONFIG(debug, debug|release) {
 
 # Override fxc binary for the x86 build.
 CONFIG(force-x86-toolchain) {
-  FXC = "\"$$(DXSDK_DIR)\\Utilities\\bin\\x86\\fxc.exe\""
+  exists($$DXSDK_DIR) {
+    FXC = "\"$$(DXSDK_DIR)\\Utilities\\bin\\x86\\fxc.exe\""
+  } else {
+    FXC = fxc.exe
+  }
 } else {
   FXC = fxc.exe
 }