diff --git a/src/Mod/Complete/Gui/AppCompleteGui.cpp b/src/Mod/Complete/Gui/AppCompleteGui.cpp
index c43fa33bc..32b9d712f 100644
--- a/src/Mod/Complete/Gui/AppCompleteGui.cpp
+++ b/src/Mod/Complete/Gui/AppCompleteGui.cpp
@@ -64,7 +64,7 @@ void CompleteGuiExport initCompleteGui()
     // try to load dependent modules, currently not (AssemblyGui, CamGui)
     char *modules[] = {"PartGui", "MeshGui", "MeshPartGui", "PointsGui", "DrawingGui", "RaytracingGui", "SketcherGui", "PartDesignGui", "ImageGui", "TestGui"};
     char nModules = sizeof(modules) / sizeof(char*);
-    for (char i = 0; i < nModules; i++) {
+    for (size_t i = 0; i < nModules; i++) {
         try {
             Base::Interpreter().loadModule(modules[i]);
         }