diff --git a/lib/roken/strpftime-test.h b/lib/roken/strpftime-test.h
index 5f9b23fda..157c77651 100644
--- a/lib/roken/strpftime-test.h
+++ b/lib/roken/strpftime-test.h
@@ -42,7 +42,13 @@
  * these evil hacks
  */
 
+#ifdef strftime
+#undef strftime
+#endif
 #define strftime test_strftime
+#ifdef strptime
+#undef strptime
+#endif
 #define strptime test_strptime
 
 ROKEN_LIB_FUNCTION size_t ROKEN_LIB_CALL