diff --git a/tests/glfwinfo.c b/tests/glfwinfo.c
index aa8b6903..a3e286ff 100644
--- a/tests/glfwinfo.c
+++ b/tests/glfwinfo.c
@@ -412,7 +412,7 @@ int main(int argc, char** argv)
     if (!glfwInit())
         exit(EXIT_FAILURE);
 
-    while ((ch = getopt_long(argc, argv, "a:b:dfhlm:n:p:s:v", options, NULL)) != -1)
+    while ((ch = getopt_long(argc, argv, "a:b:c:dfhlm:n:p:s:v", options, NULL)) != -1)
     {
         switch (ch)
         {