diff --git a/lib/mosquitto.h b/lib/mosquitto.h
index c468a5ca..f1deb3e6 100644
--- a/lib/mosquitto.h
+++ b/lib/mosquitto.h
@@ -21,7 +21,7 @@ Contributors:
 extern "C" {
 #endif
 
-#if defined(WIN32) && !defined(WITH_BROKER)
+#if defined(WIN32) && !defined(WITH_BROKER) && !defined(STATIC_LIB)
 #	ifdef libmosquitto_EXPORTS
 #		define libmosq_EXPORT  __declspec(dllexport)
 #	else