diff --git a/src/vulkan.c b/src/vulkan.c
index c39711b6..1123bb22 100644
--- a/src/vulkan.c
+++ b/src/vulkan.c
@@ -237,6 +237,9 @@ GLFWAPI const char** glfwGetRequiredInstanceExtensions(uint32_t* count)
     if (!_glfwInitVulkan(_GLFW_REQUIRE_LOADER))
         return NULL;
 
+    if (!_glfw.vk.extensions[0])
+        return NULL;
+
     *count = 2;
     return (const char**) _glfw.vk.extensions;
 }