diff --git a/src/register.h b/src/register.h
index 0d15dc3b8..7407ffc8a 100644
--- a/src/register.h
+++ b/src/register.h
@@ -25,6 +25,7 @@
 #include <hamlib/rig.h>
 #include <hamlib/rotator.h>
 #include <hamlib/amplifier.h>
+#include <config.h>
 
 #ifdef __cplusplus
 #define EXTERN_C extern "C"