diff --git a/src/main/java/com/jenkinsci/plugins/badge/action/BadgeAction.java b/src/main/java/com/jenkinsci/plugins/badge/action/BadgeAction.java
index 38d49d4..852ed3e 100644
--- a/src/main/java/com/jenkinsci/plugins/badge/action/BadgeAction.java
+++ b/src/main/java/com/jenkinsci/plugins/badge/action/BadgeAction.java
@@ -200,9 +200,7 @@ public String getBorderColor() {
      */
     public String getIconClass() {
         List<String> classes = new LinkedList<>();
-        if (isJenkinsSymbolRef(this.iconPath)) {
-            classes.add("icon-sm");
-        }
+        classes.add("icon-sm"); // control icon image size
 
         if (this.color != null) {
             if (this.color.startsWith("jenkins-!-")) {
diff --git a/src/test/java/com/jenkinsci/plugins/badge/action/BadgeActionTest.java b/src/test/java/com/jenkinsci/plugins/badge/action/BadgeActionTest.java
index 6a8eb0e..3b55c4f 100644
--- a/src/test/java/com/jenkinsci/plugins/badge/action/BadgeActionTest.java
+++ b/src/test/java/com/jenkinsci/plugins/badge/action/BadgeActionTest.java
@@ -55,7 +55,7 @@ void getIconPath(@SuppressWarnings("unused") JenkinsRule r) {
     @Test
     void getIconClass(@SuppressWarnings("unused") JenkinsRule r) {
         BadgeAction action = BadgeAction.createBadge("info.gif", "text");
-        assertEquals("", action.getIconClass());
+        assertEquals("icon-sm", action.getIconClass());
         action = BadgeAction.createBadge("symbol-star plugin-ionicons-api", "text");
         assertEquals("icon-sm", action.getIconClass());
         action = BadgeAction.createBadge("symbol-star plugin-ionicons-api", "#000000", "", null);
@@ -63,7 +63,7 @@ void getIconClass(@SuppressWarnings("unused") JenkinsRule r) {
         action = BadgeAction.createBadge("symbol-star plugin-ionicons-api", "blue", "", null);
         assertEquals("icon-sm jenkins-!-color-blue", action.getIconClass());
         action = BadgeAction.createBadge("/foo/symbol-star.gif", "blue", "", null);
-        assertEquals("jenkins-!-color-blue", action.getIconClass());
+        assertEquals("icon-sm jenkins-!-color-blue", action.getIconClass());
         action = BadgeAction.createBadge("symbol-star plugin-ionicons-api", "jenkins-!-color-red", "", null);
         assertEquals("icon-sm jenkins-!-color-red", action.getIconClass());
         // teal is not in the palette