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-rw-r--r--030container.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/030container.cc b/030container.cc
index 43d518e8..ca5b1080 100644
--- a/030container.cc
+++ b/030container.cc
@@ -635,7 +635,7 @@ void check_invalid_types(const recipe_ordinal r) {
   }
 }
 
-void check_invalid_types(type_tree* type, const string& block, const string& name) {
+void check_invalid_types(const type_tree* type, const string& block, const string& name) {
   if (!type) return;  // will throw a more precise error elsewhere
   // End Container Type Checks
   if (type->value == 0) {