diff --git a/libsrc/visualization/vssolution.cpp b/libsrc/visualization/vssolution.cpp
index 8564b6fc..fe92dbd5 100644
--- a/libsrc/visualization/vssolution.cpp
+++ b/libsrc/visualization/vssolution.cpp
@@ -2397,8 +2397,8 @@ namespace netgen
     // bool considerElem;
 
     bool hasit = false;
-#ifdef max;
-      #undef max;
+#ifdef max
+      #undef max
 #endif
     minv = numeric_limits<double>::max();
     maxv = -numeric_limits<double>::max();