diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index a7ccef402..a8440a63d 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -4782,7 +4782,7 @@ void linphone_core_init_default_params(LinphoneCore*lc, LinphoneCallParams *para
 	params->in_conference=FALSE;
 }
 
-void linphone_call_zoom_video(LinphoneCall* call, float zoom_factor, float cx, float cy) {
+void linphone_call_zoom_video(LinphoneCall* call, float zoom_factor, float* cx, float* cy) {
     VideoStream* vstream = call->videostream;
     float zoom[3];
     
@@ -4790,18 +4790,18 @@ void linphone_call_zoom_video(LinphoneCall* call, float zoom_factor, float cx, f
         zoom_factor = 1;
     float halfsize = 0.5 * 1.0 / zoom_factor;
     
-    if ((cx - halfsize) < 0)
-        cx = 0 + halfsize;
-    if ((cx + halfsize) > 1)
-        cx = 1 - halfsize;
-    if ((cy - halfsize) < 0)
-        cy = 0 + halfsize;
-    if ((cy + halfsize) > 1)
-        cy = 1 - halfsize;
+    if ((*cx - halfsize) < 0)
+        *cx = 0 + halfsize;
+    if ((*cx + halfsize) > 1)
+        *cx = 1 - halfsize;
+    if ((*cy - halfsize) < 0)
+        *cy = 0 + halfsize;
+    if ((*cy + halfsize) > 1)
+        *cy = 1 - halfsize;
     
     zoom[0] = zoom_factor;
-    zoom[1] = cx;
-    zoom[2] = cy;
+    zoom[1] = *cx;
+    zoom[2] = *cy;
     ms_filter_call_method(vstream->output, MS_VIDEO_DISPLAY_ZOOM, &zoom);
 }
 
diff --git a/coreapi/linphonecore.h b/coreapi/linphonecore.h
index d3a514a69..bd10556a0 100644
--- a/coreapi/linphonecore.h
+++ b/coreapi/linphonecore.h
@@ -1134,7 +1134,7 @@ typedef struct LinphoneTunnel LinphoneTunnel;
 */
 LinphoneTunnel *linphone_core_get_tunnel(LinphoneCore *lc);
     
-    void linphone_call_zoom_video(LinphoneCall* call, float zoom_factor, float cx, float cy);
+void linphone_call_zoom_video(LinphoneCall* call, float zoom_factor, float* cx, float* cy);
 
 #ifdef __cplusplus
 }
diff --git a/mediastreamer2 b/mediastreamer2
index 43c192346..37474c877 160000
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit 43c1923468d962aa5577ebcf6d8674ef9d426e40
+Subproject commit 37474c877a7f4e1c458c6f9edf1302e75d929dd1