diff --git a/tccgen.c b/tccgen.c
index 2ce6820f..cb9765c8 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -4036,6 +4036,10 @@ static void expr_cond(void)
 
     if (const_wanted) {
         expr_lor_const();
+    } else {
+        expr_lor();
+    }
+    if (const_wanted || ((vtop->r & (VT_VALMASK | VT_LVAL | VT_SYM)) == VT_CONST)) {
         if (tok == '?') {
             CType boolean;
             int c;
@@ -4057,7 +4061,6 @@ static void expr_cond(void)
                 vpop();
         }
     } else {
-        expr_lor();
         if (tok == '?') {
             next();
             if (vtop != vstack) {
diff --git a/tests/tcctest.c b/tests/tcctest.c
index 980b4363..57459bba 100644
--- a/tests/tcctest.c
+++ b/tests/tcctest.c
@@ -2081,6 +2081,8 @@ void *bounds_checking_is_enabled()
     return (ca != cp + 1) ? cp : NULL;
 }
 
+typedef int constant_negative_array_size_as_compile_time_assertion_idiom[(1 ? 2 : 0) - 1];
+
 void c99_vla_test(int size1, int size2)
 {
 #if defined __i386__ || defined __x86_64__