diff --git a/backends/libyahoo2/main.cpp b/backends/libyahoo2/main.cpp
index d07a7719daa2ee9339bd6947c57a9662862c1fc8..1bafecc0c47bd258cd0bf8f9addb73251ef250b9 100644
--- a/backends/libyahoo2/main.cpp
+++ b/backends/libyahoo2/main.cpp
@@ -2,7 +2,7 @@
 #include "transport/config.h"
 #include "transport/networkplugin.h"
 #include "transport/logging.h"
-#define HAVE_SWIFTEN_3  SWIFTEN_VERSION >= 0x030000
+#define HAVE_SWIFTEN_3  (SWIFTEN_VERSION >= 0x030000)
 
 // Yahoo2
 #include <yahoo2.h>