diff --git a/src/config/C4Config.cpp b/src/config/C4Config.cpp
index 1d29c46fe..95a5da55f 100644
--- a/src/config/C4Config.cpp
+++ b/src/config/C4Config.cpp
@@ -270,6 +270,8 @@ void C4ConfigControls::CompileFunc(StdCompiler *pComp)
 #endif
 }
 
+#undef s
+
 C4Config::C4Config()
 {
 	Default();