diff --git a/cf/make-proto.pl b/cf/make-proto.pl
index ed24004de..b89ef7906 100644
--- a/cf/make-proto.pl
+++ b/cf/make-proto.pl
@@ -311,7 +311,8 @@ if ($opt_E) {
 #define ${opt_E}_FUNCTION _stdcall __declspec(dllimport)
 #define ${opt_E}_VARIABLE __declspec(dllimport)
 #else
-#define $opt_E
+#define ${opt_E}_FUNCTION
+#define ${opt_E}_VARIABLE
 #endif
 #endif