diff --git a/gdk/gdkdmabufformats.c b/gdk/gdkdmabufformats.c
index 3e45e22ff9..5b7b19ef48 100644
--- a/gdk/gdkdmabufformats.c
+++ b/gdk/gdkdmabufformats.c
@@ -207,7 +207,8 @@ gdk_dmabuf_formats_new (GdkDmabufFormat *formats,
   self->n_formats = n_formats;
   self->formats = g_new (GdkDmabufFormat, n_formats);
 
-  memcpy (self->formats, formats, n_formats * sizeof (GdkDmabufFormat));
+  if (n_formats != 0)
+    memcpy (self->formats, formats, n_formats * sizeof (GdkDmabufFormat));
 
   return self;
 }
diff --git a/gtk/gtksymbolicpaintable.c b/gtk/gtksymbolicpaintable.c
index 057be29742..0509eb5d9c 100644
--- a/gtk/gtksymbolicpaintable.c
+++ b/gtk/gtksymbolicpaintable.c
@@ -110,7 +110,8 @@ gtk_symbolic_paintable_snapshot_symbolic (GtkSymbolicPaintable   *paintable,
         [GTK_SYMBOLIC_COLOR_SUCCESS] = { 0.3046921492332342,0.6015716792553597, 0.023437857633325704, 1.0 }
       };
 
-      memcpy (real_colors, colors, sizeof (GdkRGBA) * n_colors);
+      if (n_colors != 0)
+        memcpy (real_colors, colors, sizeof (GdkRGBA) * n_colors);
 
       iface->snapshot_symbolic (paintable, snapshot, width, height, real_colors, 4);
     }