diff --git a/tools/widl/parser.y b/tools/widl/parser.y
index 93f7b0f52b9..02db99a55b7 100644
--- a/tools/widl/parser.y
+++ b/tools/widl/parser.y
@@ -2326,7 +2326,7 @@ struct allowed_attr
 struct allowed_attr allowed_attr[] =
 {
     /* attr                        { D ACF M   I Fn ARG T En Enm St Un Fi L  DI M  C AC  R  <display name> } */
-    /* ATTR_ACTIVATABLE */         { 0, 0, 0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, "activatable" },
+    /* ATTR_ACTIVATABLE */         { 0, 0, 1,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, "activatable" },
     /* ATTR_AGGREGATABLE */        { 0, 0, 0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, "aggregatable" },
     /* ATTR_ALLOCATE */            { 0, 1, 0,  0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, "allocate" },
     /* ATTR_ANNOTATION */          { 0, 0, 0,  0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, "annotation" },