diff --git a/src/engine/helper/HL_Process.h b/src/engine/helper/HL_Process.h
index ed6f6e5e..3c1de6a4 100644
--- a/src/engine/helper/HL_Process.h
+++ b/src/engine/helper/HL_Process.h
@@ -6,7 +6,7 @@
 class OsProcess
 {
 public:
-    std::string execCommand(const std::string& cmdline);
+    static std::string execCommand(const std::string& cmdline);
 };
 
 #endif