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-rw-r--r--src/emu/debug/debughlp.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/emu/debug/debughlp.cpp b/src/emu/debug/debughlp.cpp
index 601bed4a440..ded8cafb993 100644
--- a/src/emu/debug/debughlp.cpp
+++ b/src/emu/debug/debughlp.cpp
@@ -1518,7 +1518,7 @@ const char *debug_get_help(const char *tag)
/* make a lowercase copy of the tag */
for (i = 0; i <= taglen; i++)
- tagcopy[i] = tolower((uint8_t)tag[i]);
+ tagcopy[i] = tolower(u8(tag[i]));
/* find a match */
for (i = 0; i < ARRAY_LENGTH(static_help_list); i++)