diff --git a/src/apps/haikudepot/model/WebAppInterface.cpp b/src/apps/haikudepot/model/WebAppInterface.cpp
index 921e7dd767..cc0072df4a 100644
--- a/src/apps/haikudepot/model/WebAppInterface.cpp
+++ b/src/apps/haikudepot/model/WebAppInterface.cpp
@@ -405,8 +405,8 @@ WebAppInterface::_GetUserAgentVersionString()
 	}
 
 	BString result;
-	result.SetToFormat("%ld.%ld.%ld", versionInfo.major, versionInfo.middle,
-		versionInfo.minor);
+	result.SetToFormat("%" B_PRId32 ".%" B_PRId32 ".%" B_PRId32,
+		versionInfo.major, versionInfo.middle, versionInfo.minor);
 	return result;
 }