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-rw-r--r--src/emu/machine.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/emu/machine.h b/src/emu/machine.h
index c821a43ee3a..7b4efec70da 100644
--- a/src/emu/machine.h
+++ b/src/emu/machine.h
@@ -251,7 +251,7 @@ private:
void nvram_load();
void nvram_save();
void popup_clear() const;
- void popup_message(util::format_argument_pack<std::ostream> const &args) const;
+ void popup_message(util::format_argument_pack<char> const &args) const;
// internal callbacks
void logfile_callback(const char *buffer);