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-rw-r--r--build2/variable2
1 files changed, 1 insertions, 1 deletions
diff --git a/build2/variable b/build2/variable
index d22d6da..48acfea 100644
--- a/build2/variable
+++ b/build2/variable
@@ -86,7 +86,7 @@ namespace build2
struct variable
{
string name;
- const value_type* type; // If NULL, then not (yet) typed.
+ mutable const value_type* type; // If NULL, then not (yet) typed.
mutable unique_ptr<variable> override;
variable_visibility visibility;
};