diff --git a/tests/gamma.c b/tests/gamma.c
index 734955cd..d1f6dc27 100644
--- a/tests/gamma.c
+++ b/tests/gamma.c
@@ -113,6 +113,12 @@ int main(int argc, char** argv)
 
     {
         const GLFWgammaramp* ramp = glfwGetGammaRamp(monitor);
+        if (!ramp)
+        {
+            glfwTerminate();
+            exit(EXIT_FAILURE);
+        }
+
         const size_t array_size = ramp->size * sizeof(short);
         orig_ramp.size = ramp->size;
         orig_ramp.red = malloc(array_size);