diff --git a/phpBB/styles/prosilver/theme/buttons.css b/phpBB/styles/prosilver/theme/buttons.css
index 77325f3d32..3a22537578 100644
--- a/phpBB/styles/prosilver/theme/buttons.css
+++ b/phpBB/styles/prosilver/theme/buttons.css
@@ -163,6 +163,12 @@
 	max-width: 40%;
 }
 
+/* Format buttons
+--------------------------------------------- */
+.format-buttons .button {
+	margin-bottom: 3px;
+}
+
 /* Browser-specific tweaks */
 button::-moz-focus-inner {
 	border: 0;
diff --git a/phpBB/styles/prosilver/theme/forms.css b/phpBB/styles/prosilver/theme/forms.css
index 1257c2c56d..757269c959 100644
--- a/phpBB/styles/prosilver/theme/forms.css
+++ b/phpBB/styles/prosilver/theme/forms.css
@@ -252,6 +252,7 @@ fieldset.submit-buttons input {
 .format-buttons input,
 .format-buttons select {
 	vertical-align: middle;
+	margin-bottom: 3px;
 }
 
 /* Main message box */