--- src/eog-metadata-reader-png.c
+++ src/eog-metadata-reader-png.c
@@ -369,8 +369,7 @@
 			if (priv->state == EMR_CHECK_CRC) {
 				/* Check if it is actually an XMP chunk.
 				 * Throw it away if not. */
-				if ((memcmp (priv->xmp_chunk, "XML:com.adobe.xmp\0", 18) != 0)
-				    || (*(guint32*)(priv->xmp_chunk+18)) != 0) {
+				if (memcmp (priv->xmp_chunk, "XML:com.adobe.xmp\0\0\0\0\0", 22) != 0) {
 					priv->state = EMR_SKIP_CRC;
 					g_free (priv->xmp_chunk);
 					priv->xmp_chunk = NULL;