diff --git a/bundles/org.openhab.core.model.sitemap/src/org/openhab/core/model/sitemap/Sitemap.xtext b/bundles/org.openhab.core.model.sitemap/src/org/openhab/core/model/sitemap/Sitemap.xtext
index 4b4376ac0a..101297bf8b 100644
--- a/bundles/org.openhab.core.model.sitemap/src/org/openhab/core/model/sitemap/Sitemap.xtext
+++ b/bundles/org.openhab.core.model.sitemap/src/org/openhab/core/model/sitemap/Sitemap.xtext
@@ -156,7 +156,11 @@ GroupItemRef:
     ID;
 
 Icon returns ecore::EString:
-    STRING | ID;
+    STRING | (ID ':' (ID ':')?)? IconName;
+
+// Allow hyphen inside an icon name
+IconName:
+    (ID '-')* ID;
 
 ColorArray:
     ((item=ID)? (condition=('==' | '>' | '<' | '>=' | '<=' | '!='))? (sign=('-' | '+'))? (state=XState) '=')?