diff --git a/mozilla-1508378.patch b/mozilla-1508378.patch
new file mode 100644
index 0000000..127256e
--- /dev/null
+++ b/mozilla-1508378.patch
@@ -0,0 +1,55 @@
+diff -up thunderbird-60.6.1/widget/gtk/WindowSurfaceWayland.cpp.1508378 thunderbird-60.6.1/widget/gtk/WindowSurfaceWayland.cpp
+--- thunderbird-60.6.1/widget/gtk/WindowSurfaceWayland.cpp.1508378	2019-04-12 09:23:26.846503741 +0200
++++ thunderbird-60.6.1/widget/gtk/WindowSurfaceWayland.cpp	2019-04-12 09:25:45.661937077 +0200
+@@ -567,6 +567,23 @@ static void WaylandBufferDelayCommitHand
+   }
+ }
+ 
++void WindowSurfaceWayland::CalcRectScale(LayoutDeviceIntRect& aRect, int aScale) {
++  if (aRect.x & 0x1) {
++    aRect.width += 1;
++  }
++  aRect.x = aRect.x / aScale;
++
++  if (aRect.y & 0x1) {
++    aRect.height += 1;
++  }
++  aRect.y = aRect.y / aScale;
++
++  aRect.width = (aRect.width & 0x1) ? aRect.width / aScale + 1 :
++                                      aRect.width / aScale;
++  aRect.height = (aRect.height & 0x1) ? aRect.height / aScale + 1 :
++                                        aRect.height / aScale;
++}
++
+ void WindowSurfaceWayland::CommitWaylandBuffer() {
+   MOZ_ASSERT(mPendingCommit, "Committing empty surface!");
+ 
+@@ -617,11 +634,13 @@ void WindowSurfaceWayland::CommitWayland
+     gint scaleFactor = mWindow->GdkScaleFactor();
+     for (auto iter = mWaylandBufferDamage.RectIter(); !iter.Done();
+          iter.Next()) {
+-      const mozilla::LayoutDeviceIntRect& r = iter.Get();
++      mozilla::LayoutDeviceIntRect r = iter.Get();
+       // We need to remove the scale factor because the wl_surface_damage
+       // also multiplies by current  scale factor.
+-      wl_surface_damage(waylandSurface, r.x / scaleFactor, r.y / scaleFactor,
+-                        r.width / scaleFactor, r.height / scaleFactor);
++      if (scaleFactor > 1) {
++        CalcRectScale(r, scaleFactor);
++      }
++      wl_surface_damage(waylandSurface, r.x, r.y, r.width, r.height);
+     }
+   }
+ 
+diff -up thunderbird-60.6.1/widget/gtk/WindowSurfaceWayland.h.1508378 thunderbird-60.6.1/widget/gtk/WindowSurfaceWayland.h
+--- thunderbird-60.6.1/widget/gtk/WindowSurfaceWayland.h.1508378	2019-04-12 09:23:26.817503860 +0200
++++ thunderbird-60.6.1/widget/gtk/WindowSurfaceWayland.h	2019-04-12 09:23:26.846503741 +0200
+@@ -101,6 +101,7 @@ class WindowSurfaceWayland : public Wind
+       const gfx::IntSize& aLockSize);
+   bool CommitImageSurfaceToWaylandBuffer(const LayoutDeviceIntRegion& aRegion);
+   void CommitWaylandBuffer();
++  void CalcRectScale(LayoutDeviceIntRect& aRect, int scale);
+ 
+   // TODO: Do we need to hold a reference to nsWindow object?
+   nsWindow* mWindow;
diff --git a/thunderbird.spec b/thunderbird.spec
index eb393bb..e6155bc 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -89,7 +89,7 @@ ExcludeArch: s390x
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
 Version:        60.6.1
-Release:        3%{?dist}
+Release:        4%{?dist}
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Group:          Applications/Internet
@@ -135,6 +135,7 @@ Patch312:       mozilla-1522780.patch
 Patch400:       mozilla-1526243.patch
 Patch401:       mozilla-1540145.patch
 Patch402:       mozilla-526293.patch
+Patch403:       mozilla-1508378.patch
 
 %if %{official_branding}
 # Required by Mozilla Corporation
@@ -275,6 +276,7 @@ debug %{name}, you want to install %{name}-debuginfo instead.
 %patch400 -p1 -b .1526243
 %patch401 -p1 -b .1540145
 %patch402 -p1 -b .526293
+%patch403 -p1 -b .1508378
 
 %if %{official_branding}
 # Required by Mozilla Corporation
@@ -696,6 +698,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Fri Apr 12 2019 Martin Stransky <stransky@redhat.com> - 60.6.1-4
+- Addef fix for mozbz#1508378
+
 * Wed Apr 3 2019 Martin Stransky <stransky@redhat.com> - 60.6.1-3
 - Added fixes for mozbz#1526243, mozbz#1540145, mozbz#526293