diff --git a/makefile b/makefile
index 31782fa36fe..7b7bba3a782 100644
--- a/makefile
+++ b/makefile
@@ -273,6 +273,9 @@ endif
 endif
 
 ifeq ($(OS),windows)
+ifndef $(MINGW64)
+ARCHITECTURE := _x86
+endif
 ifeq ($(ARCHITECTURE),_x64)
 WINDRES  := $(MINGW64)/bin/windres
 else