@@ -1,11 +1,14 @@
 #! /usr/bin/env bash
 
-(
-	echo '#ifndef _USE_32BIT_TIME_T'
-	echo '#define _USE_32BIT_TIME_T 1'
-	echo '#endif'
-	cat generic/tcl.h
-) > generic/tcl.h.new
-cat generic/tcl.h.new > generic/tcl.h
+# Do not run on Win32
+if echo '_WIN64' | x86_64-w64-mingw32-gcc -E - | grep '^_WIN64$'; then
+	(
+		echo '#ifndef _USE_32BIT_TIME_T'
+		echo '#define _USE_32BIT_TIME_T 1'
+		echo '#endif'
+		cat generic/tcl.h
+	) > generic/tcl.h.new
+	cat generic/tcl.h.new > generic/tcl.h
+fi
 
 exit 0