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-rw-r--r--src/emu/validity.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/emu/validity.cpp b/src/emu/validity.cpp
index 03530727721..93c06eff52d 100644
--- a/src/emu/validity.cpp
+++ b/src/emu/validity.cpp
@@ -81,7 +81,7 @@ void validity_checker::validate_tag(const char *tag)
osd_printf_error("Invalid generic tag '%s' used\n", tag);
// scan for invalid characters
- static const char *validchars = "abcdefghijklmnopqrstuvwxyz0123456789_.:^$";
+ static char const *const validchars = "abcdefghijklmnopqrstuvwxyz0123456789_.:^$";
for (const char *p = tag; *p != 0; p++)
{
// only lower-case permitted