diff --git a/backend/src/osx_platform.cpp b/backend/src/osx_platform.cpp
index 2bce65e..70ae5ed 100644
--- a/backend/src/osx_platform.cpp
+++ b/backend/src/osx_platform.cpp
@@ -166,7 +166,7 @@ InterfaceInfo OSXPlatform::service_info(SCNetworkServiceRef service)
 string OSXPlatform::stringFromCFString(CFStringRef cfString, CFStringEncoding encoding)
 {
   char *cstring = NULL;
-  int maxLen = NULL;
+  int maxLen = 0;
   string result;
 
   if (cfString != NULL) {