diff --git a/src/typval.c b/src/typval.c
index 7c55d3a..0e2513a 100644
--- a/src/typval.c
+++ b/src/typval.c
@@ -213,7 +213,10 @@
 	case VAR_SPECIAL:
 	    if (!want_bool && in_vim9script())
 	    {
-		emsg(_("E611: Using a Special as a Number"));
+		if (varp->v_type == VAR_BOOL)
+		    emsg(_(e_using_bool_as_number));
+		else
+		    emsg(_("E611: Using a Special as a Number"));
 		break;
 	    }
 	    return varp->vval.v_number == VVAL_TRUE ? 1 : 0;