diff --git a/src/tqca.h b/src/tqca.h
index fe3dcc8..e5cacb7 100644
--- a/src/tqca.h
+++ b/src/tqca.h
@@ -48,7 +48,7 @@
 #  endif
 #endif
 #ifndef TQCA_PLUGIN_EXPORT
-#define TQCA_PLUGIN_EXPORT extern "C"
+#define TQCA_PLUGIN_EXPORT extern "C" TQCA_EXPORT
 #endif
 
 class TQHostAddress;