diff --git a/modules/jquery.wikiEditor.js b/modules/jquery.wikiEditor.js
index b346ad42..8ffbcec8 100644
--- a/modules/jquery.wikiEditor.js
+++ b/modules/jquery.wikiEditor.js
@@ -196,6 +196,12 @@
 				key = fallbackChain[ i ];
 				if ( icon && hasOwn.call( icon, key ) ) {
 					src = icon[ key ];
+
+					// Return a data URL immediately
+					if ( src.substr( 0, 5 ) === 'data:' ) {
+						return src;
+					}
+
 					// Prepend path if src is not absolute
 					if ( src.substr( 0, 7 ) !== 'http://' && src.substr( 0, 8 ) !== 'https://' && src[ 0 ] !== '/' ) {
 						src = path + src;