diff --git a/src/cbor.h b/src/cbor.h
index be5bbc77..31b1036e 100644
--- a/src/cbor.h
+++ b/src/cbor.h
@@ -34,6 +34,10 @@
 #include <string.h>
 #include <stdio.h>
 
+#ifdef CBOR_EXTERNAL_CFG
+#include "cbor_cfg.h"
+#endif
+
 #include "tinycbor-version.h"
 
 #define TINYCBOR_VERSION            ((TINYCBOR_VERSION_MAJOR << 16) | (TINYCBOR_VERSION_MINOR << 8) | TINYCBOR_VERSION_PATCH)