diff --git a/src/check_type.cpp b/src/check_type.cpp
index e3609970a..22b77db3c 100644
--- a/src/check_type.cpp
+++ b/src/check_type.cpp
@@ -2454,9 +2454,15 @@ gb_internal i64 check_array_count(CheckerContext *ctx, Operand *o, Ast *e) {
 	if (e == nullptr) {
 		return 0;
 	}
-	if (e->kind == Ast_UnaryExpr &&
-	    e->UnaryExpr.op.kind == Token_Question) {
-		return -1;
+	if (e->kind == Ast_UnaryExpr) {
+		Token op = e->UnaryExpr.op;
+		if (op.kind == Token_Question) {
+			return -1;
+		}
+		if (e->UnaryExpr.expr == nullptr) {
+			error(op, "Invalid array count '[%.*s]'", LIT(op.string));
+			return 0;
+		}
 	}
 
 	check_expr_or_type(ctx, o, e);