diff --git a/src/wl_init.c b/src/wl_init.c
index fa7a5cfe..685cc650 100644
--- a/src/wl_init.c
+++ b/src/wl_init.c
@@ -1195,14 +1195,15 @@ int _glfwPlatformInit(void)
             wl_data_device_manager_get_data_device(_glfw.wl.dataDeviceManager,
                                                    _glfw.wl.seat);
         wl_data_device_add_listener(_glfw.wl.dataDevice, &dataDeviceListener, NULL);
-        _glfw.wl.clipboardString = malloc(4096);
+
+        _glfw.wl.clipboardSize = 4096;
+        _glfw.wl.clipboardString = calloc(_glfw.wl.clipboardSize, 1);
         if (!_glfw.wl.clipboardString)
         {
             _glfwInputError(GLFW_PLATFORM_ERROR,
                             "Wayland: Unable to allocate clipboard memory");
             return GLFW_FALSE;
         }
-        _glfw.wl.clipboardSize = 4096;
     }
 
     return GLFW_TRUE;