diff --git a/packages/parser/src/language/architecture/architecture.langium b/packages/parser/src/language/architecture/architecture.langium
index 6246b423e..11af26243 100644
--- a/packages/parser/src/language/architecture/architecture.langium
+++ b/packages/parser/src/language/architecture/architecture.langium
@@ -49,7 +49,7 @@ Edge:
 terminal ARROW_DIRECTION: 'L' | 'R' | 'T' | 'B';
 terminal ARCH_ID: /[\w]+/;
 terminal ARCH_TEXT_ICON: /\("[^"]+"\)/;
-terminal ARCH_ICON: /\([\w:]+\)/;
+terminal ARCH_ICON: /\([\w-:]+\)/;
 terminal ARCH_TITLE: /\[[\w ]+\]/;
 terminal ARROW_GROUP: /\{group\}/;
-terminal ARROW_INTO: /<|>/;
\ No newline at end of file
+terminal ARROW_INTO: /<|>/;