diff --git a/src/enc/config.c b/src/enc/config.c
index 3ed395e8..f7975ffc 100644
--- a/src/enc/config.c
+++ b/src/enc/config.c
@@ -11,6 +11,10 @@
 //
 // Author: Skal (pascal.massimino@gmail.com)
 
+#ifdef HAVE_CONFIG_H
+#include "../webp/config.h"
+#endif
+
 #include "../webp/encode.h"
 
 //------------------------------------------------------------------------------