diff --git a/tests/gpgscm/scheme-config.h b/tests/gpgscm/scheme-config.h
index 20034981a..15ca969a4 100644
--- a/tests/gpgscm/scheme-config.h
+++ b/tests/gpgscm/scheme-config.h
@@ -30,7 +30,3 @@
 #define USE_PLIST		0
 #define USE_INTERFACE		1
 #define SHOW_ERROR_LINE		1
-
-#if __MINGW32__
-# define USE_STRLWR 0
-#endif /* __MINGW32__ */
diff --git a/tests/gpgscm/scheme.c b/tests/gpgscm/scheme.c
index b2ff72145..af97c27d6 100644
--- a/tests/gpgscm/scheme.c
+++ b/tests/gpgscm/scheme.c
@@ -12,6 +12,10 @@
  *
  */
 
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
 #define _SCHEME_SOURCE
 #include "scheme-private.h"
 #ifndef WIN32
@@ -88,7 +92,7 @@ static int stricmp(const char *s1, const char *s2)
 }
 #endif /* __APPLE__ */
 
-#if USE_STRLWR
+#if USE_STRLWR && !defined(HAVE_STRLWR)
 static const char *strlwr(char *s) {
   const char *p=s;
   while(*s) {