diff --git a/src/main.cc b/src/main.cc
index eccb986..482a21a 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -86,10 +86,10 @@ int main(int argc, char **argv) {
 	double radiusScale = 2.;
 	int iterCount = 1;
 	if(argc > 4) {
-		radiusScale = std::stod(argv[3]);
+		radiusScale = std::stod(argv[4]);
 	}
 	if (argc > 5) {
-		iterCount = std::stoi(argv[4]);
+		iterCount = std::stoi(argv[5]);
 	}
 
 	auto tetMeshReader = readerFromFileName(argv[2]);