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-rw-r--r--src/libexpr/symbol-table.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libexpr/symbol-table.hh b/src/libexpr/symbol-table.hh
index c2ee49dd32fb..44929f7eea06 100644
--- a/src/libexpr/symbol-table.hh
+++ b/src/libexpr/symbol-table.hh
@@ -69,7 +69,7 @@ public:
         return Symbol(&*res.first);
     }
 
-    unsigned int size() const
+    size_t size() const
     {
         return symbols.size();
     }