diff --git a/src/Mod/Measure/App/AppMeasure.cpp b/src/Mod/Measure/App/AppMeasure.cpp
index 6a3cff3cf5..993e016eb9 100644
--- a/src/Mod/Measure/App/AppMeasure.cpp
+++ b/src/Mod/Measure/App/AppMeasure.cpp
@@ -74,7 +74,7 @@ PyMOD_INIT_FUNC(Measure)
 }
 
 // debug print for sketchsolv 
-void debugprint(std::string s)
+void debugprint(const std::string& s)
 {
-    Base::Console().Log(s.c_str());
+    Base::Console().Log("%s", s.c_str());
 }