diff --git a/libs/openFrameworks/types/ofParameter.h b/libs/openFrameworks/types/ofParameter.h
index f26625d2118..da483c5719e 100644
--- a/libs/openFrameworks/types/ofParameter.h
+++ b/libs/openFrameworks/types/ofParameter.h
@@ -195,7 +195,7 @@ class ofParameterGroup : public ofAbstractParameter {
 	}
 	
 	void reInit()  {
-		for (int i = 0; i < size(); i++) {
+		for (std::size_t i = 0; i < size(); i++) {
 			get(i).reInit();
 		}
 	}