diff --git a/proto/ei-scanner b/proto/ei-scanner
index 1ecfcaf..122d3e9 100755
--- a/proto/ei-scanner
+++ b/proto/ei-scanner
@@ -814,7 +814,9 @@ def generate_source(
 
         import re
 
-        return re.sub(rf"({component}[_-]\w*)(\.\w*)?", rf"{quotes}\1\2{quotes}", str)
+        return re.sub(
+            rf"({component}[_-]\w*)(\.[.\w]*)?", rf"{quotes}\1\2{quotes}", str
+        )
 
     env.filters["c_type"] = filter_c_type
     env.filters["as_c_arg"] = filter_as_c_arg