diff --git a/hw/xfree86/drivers/modesetting/drmmode_display.c b/hw/xfree86/drivers/modesetting/drmmode_display.c
index 2072ce0c5..cf4269403 100644
--- a/hw/xfree86/drivers/modesetting/drmmode_display.c
+++ b/hw/xfree86/drivers/modesetting/drmmode_display.c
@@ -1910,8 +1910,9 @@ drmmode_set_gamma_lut(drmmode_crtc_private_ptr drmmode_crtc,
     drmmode_prop_info_ptr gamma_lut_info =
         &drmmode_crtc->props[DRMMODE_CRTC_GAMMA_LUT];
     const uint32_t crtc_id = drmmode_crtc->mode_crtc->crtc_id;
-    uint32_t blob_id;
-    struct drm_color_lut lut[size];
+    struct drm_color_lut *lut = calloc(size, sizeof(struct drm_color_lut));
+    if (!lut)
+        return;
 
     assert(gamma_lut_info->prop_id != 0);
 
@@ -1922,13 +1923,17 @@ drmmode_set_gamma_lut(drmmode_crtc_private_ptr drmmode_crtc,
         lut[i].reserved = 0;
     }
 
-    if (drmModeCreatePropertyBlob(drmmode->fd, lut, sizeof(lut), &blob_id))
+    uint32_t blob_id;
+    if (drmModeCreatePropertyBlob(drmmode->fd, lut, sizeof(lut), &blob_id)) {
+        free(lut);
         return;
+    }
 
     drmModeObjectSetProperty(drmmode->fd, crtc_id, DRM_MODE_OBJECT_CRTC,
                              gamma_lut_info->prop_id, blob_id);
 
     drmModeDestroyPropertyBlob(drmmode->fd, blob_id);
+    free(lut);
 }
 
 static void