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-rw-r--r--src/emu/xtal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/emu/xtal.h b/src/emu/xtal.h
index f3e9b7d0cbd..b58f00943b2 100644
--- a/src/emu/xtal.h
+++ b/src/emu/xtal.h
@@ -69,7 +69,7 @@ private:
static const double known_xtals[];
static double last_correct_value, xtal_error_low, xtal_error_high;
- static void fail(double base_clock, std::string message);
+ static void fail(double base_clock, const std::string &message);
static bool validate(double base_clock);
static void check_ordering();
};