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-rw-r--r--src/emu/validity.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/emu/validity.h b/src/emu/validity.h
index 54687716bd7..fbf5f239323 100644
--- a/src/emu/validity.h
+++ b/src/emu/validity.h
@@ -51,7 +51,7 @@ public:
protected:
// osd_output interface
- virtual void output_callback(osd_output_channel channel, const util::format_argument_pack<std::ostream> &args) override;
+ virtual void output_callback(osd_output_channel channel, const util::format_argument_pack<char> &args) override;
private:
// internal map types