diff --git a/include/mbedtls/ecp_internal.h b/include/mbedtls/ecp_internal.h
index 7625ed4..3b6fbf1 100644
--- a/include/mbedtls/ecp_internal.h
+++ b/include/mbedtls/ecp_internal.h
@@ -62,7 +62,7 @@
 #define MBEDTLS_ECP_INTERNAL_H
 
 #if !defined(MBEDTLS_CONFIG_FILE)
-#include "config.h"
+#include "mbedtls/config.h"
 #else
 #include MBEDTLS_CONFIG_FILE
 #endif