diff --git a/source/sw/src/draw.cpp b/source/sw/src/draw.cpp
index ba5e04ef0..fb48f8950 100644
--- a/source/sw/src/draw.cpp
+++ b/source/sw/src/draw.cpp
@@ -1035,6 +1035,8 @@ post_analyzesprites(void)
 }
 #endif
 
+static ClockTicks mapzoomclock;
+
 void
 ResizeView(PLAYERp pp)
 {
@@ -1043,15 +1045,13 @@ ResizeView(PLAYERp pp)
 
     if (dimensionmode == 2 || dimensionmode == 5 || dimensionmode == 6)
     {
-        if (inputState.GetKeyStatus(KEYSC_DASH)||inputState.GetKeyStatus(KEYSC_GMINUS))
-        {
-            if ((zoom -= (zoom >> 4)) < 48) zoom = 48;
-        }
+        int32_t timepassed = (int32_t)(totalclock - mapzoomclock);
+        mapzoomclock += timepassed;
+        if (inputState.GetKeyStatus(KEYSC_DASH)||inputState.GetKeyStatus(KEYSC_GMINUS))            
+            zoom = max<int32_t>(zoom - mulscale7(timepassed * synctics, zoom), 48);
 
         if (inputState.GetKeyStatus(KEYSC_EQUAL)||inputState.GetKeyStatus(KEYSC_GPLUS))
-        {
-            if ((zoom += (zoom >> 4)) > 4096) zoom = 4096;
-        }
+            zoom = min<int32_t>(zoom + mulscale7(timepassed * synctics, zoom), 4096);
 
         if (inputState.GetKeyStatus(KEYSC_ESC))
         {