diff --git a/src/main/gtk-3.0/gtk-dark.css b/src/main/gtk-3.0/gtk-dark.css
index 0f941c3a..365596c0 100644
--- a/src/main/gtk-3.0/gtk-dark.css
+++ b/src/main/gtk-3.0/gtk-dark.css
@@ -3159,6 +3159,7 @@ popover.background {
 popover.background, .csd popover.background {
   border: 1px solid rgba(255, 255, 255, 0.1);
   box-shadow: 0 2px 2.4px -1px rgba(0, 0, 0, 0.2), 0 4px 3px 0 rgba(0, 0, 0, 0.14), 0 1px 6px 0 rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(0, 0, 0, 0.75);
+  background-clip: border-box;
 }
 
 popover.background:backdrop, .csd popover.background:backdrop {
diff --git a/src/main/gtk-3.0/gtk-light.css b/src/main/gtk-3.0/gtk-light.css
index 9c001231..8fd58f12 100644
--- a/src/main/gtk-3.0/gtk-light.css
+++ b/src/main/gtk-3.0/gtk-light.css
@@ -3159,6 +3159,7 @@ popover.background {
 popover.background, .csd popover.background {
   border: 1px solid rgba(255, 255, 255, 0.15);
   box-shadow: 0 2px 2.4px -1px rgba(0, 0, 0, 0.2), 0 4px 3px 0 rgba(0, 0, 0, 0.14), 0 1px 6px 0 rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(0, 0, 0, 0.12);
+  background-clip: border-box;
 }
 
 popover.background:backdrop, .csd popover.background:backdrop {
diff --git a/src/main/gtk-3.0/gtk.css b/src/main/gtk-3.0/gtk.css
index 935f28f6..f8a3e536 100644
--- a/src/main/gtk-3.0/gtk.css
+++ b/src/main/gtk-3.0/gtk.css
@@ -3168,6 +3168,7 @@ popover.background {
 popover.background, .csd popover.background {
   border: 1px solid rgba(255, 255, 255, 0.15);
   box-shadow: 0 2px 2.4px -1px rgba(0, 0, 0, 0.2), 0 4px 3px 0 rgba(0, 0, 0, 0.14), 0 1px 6px 0 rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(0, 0, 0, 0.12);
+  background-clip: border-box;
 }
 
 popover.background:backdrop, .csd popover.background:backdrop {
diff --git a/src/sass/gtk/_common-3.0.scss b/src/sass/gtk/_common-3.0.scss
index a2ba00dd..9b1b4936 100644
--- a/src/sass/gtk/_common-3.0.scss
+++ b/src/sass/gtk/_common-3.0.scss
@@ -1754,6 +1754,7 @@ popover.background {
     } @else {
       border: 1px solid highlight($surface);
       box-shadow: $shadow-z4, 0 0 0 1px $window-border;
+      background-clip: border-box;
 
       &:backdrop { box-shadow: $shadow-z2, 0 0 0 1px $window-border; }
     }