diff --git a/Source/Checks/cm_cxx_attribute_fallthrough.cxx b/Source/Checks/cm_cxx_attribute_fallthrough.cxx
index df43625a4a..50605b70a5 100644
--- a/Source/Checks/cm_cxx_attribute_fallthrough.cxx
+++ b/Source/Checks/cm_cxx_attribute_fallthrough.cxx
@@ -1,4 +1,4 @@
-int main(int argc, char* argv[])
+int main(int argc, char* [])
 {
   int i = 3;
   switch (argc) {
diff --git a/Source/Checks/cm_cxx_fallthrough.cxx b/Source/Checks/cm_cxx_fallthrough.cxx
index 7b35a5f29a..2825bed1e9 100644
--- a/Source/Checks/cm_cxx_fallthrough.cxx
+++ b/Source/Checks/cm_cxx_fallthrough.cxx
@@ -1,4 +1,4 @@
-int main(int argc, char* argv[])
+int main(int argc, char* [])
 {
   int i = 3;
   switch (argc) {
diff --git a/Source/Checks/cm_cxx_gnu_fallthrough.cxx b/Source/Checks/cm_cxx_gnu_fallthrough.cxx
index 6021094053..ebc15f4319 100644
--- a/Source/Checks/cm_cxx_gnu_fallthrough.cxx
+++ b/Source/Checks/cm_cxx_gnu_fallthrough.cxx
@@ -1,4 +1,4 @@
-int main(int argc, char* argv[])
+int main(int argc, char* [])
 {
   int i = 3;
   switch (argc) {