diff --git a/src/check_builtin.cpp b/src/check_builtin.cpp
index 2770ac430..b4bb5e314 100644
--- a/src/check_builtin.cpp
+++ b/src/check_builtin.cpp
@@ -769,12 +769,12 @@ gb_internal bool check_builtin_c_procedure(CheckerContext *c, Operand *operand,
 		Operand args = {};
 		check_expr(c, &args, ce->args[1]);
 		c->allow_c_vararg_param = false;
-		if (list.mode == Addressing_Invalid) {
+		if (args.mode == Addressing_Invalid) {
 			return false;
 		}
 		Entity *e = entity_of_node(args.expr);
 		if (e == nullptr || (e->flags & EntityFlag_CVarArg) == 0) {
-			error(list.expr, "'%.*s' expected a `#c_vararg` parameter", LIT(builtin_name));
+			error(args.expr, "'%.*s' expected a `#c_vararg` parameter", LIT(builtin_name));
 		}
 
 		operand->mode = Addressing_NoValue;
@@ -857,7 +857,7 @@ gb_internal bool check_builtin_c_procedure(CheckerContext *c, Operand *operand,
 
 		Type *type = check_type(c, ce->args[1]);
 		if (type == nullptr || type == t_invalid) {
-			error(ce->args[1], "'%.*s' expected a type as the second parameter to intrinsics.%.*s", LIT(builtin_name));
+			error(ce->args[1], "'%.*s' expected a type as the second parameter", LIT(builtin_name));
 			return false;
 		}