diff --git a/api/src/c/api-client.c b/api/src/c/api-client.c
index 8935993ab1..5045050c46 100644
--- a/api/src/c/api-client.c
+++ b/api/src/c/api-client.c
@@ -70,8 +70,10 @@ void MapsWithMe_LatLonToString(double lat, double lon, char * s, int nBytes)
   }
 }
 
-char * MapsWithMe_GenShortShowMapUrl(double lat, double lon, double zoomLevel, char const * name)
+int MapsWithMe_GenShortShowMapUrl(double lat, double lon, double zoomLevel, char const * name, char * buf, int bufSize)
 {
   // @TODO: Implement MapsWithMe_GenShortShowMapUrl().
+  // @TODO: Escape URL-unfriendly characters: ! * ' ( ) ; : @ & = + $ , / ? % # [ ]
+
   return 0;
 }
diff --git a/api/src/c/api-client.h b/api/src/c/api-client.h
index 5562373150..9335a8950b 100644
--- a/api/src/c/api-client.h
+++ b/api/src/c/api-client.h
@@ -39,7 +39,8 @@ char * MapsWithMe_GenShowMapUrl(MapsWithMe_ShowMapRequest const * request);
 */
 
 // Helper method to generate short url.
-char * MapsWithMe_GenShortShowMapUrl(double lat, double lon, double zoomLevel, char const * name);
+// Returns the number of bytes required to fit the whole URL or an error_code < 0 on error.
+int MapsWithMe_GenShortShowMapUrl(double lat, double lon, double zoomLevel, char const * name, char * buf, int bufSize);
 
 #ifdef __cplusplus
 }  // Closing brace for extern "C"