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-rw-r--r--src/emu/emuopts.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/emu/emuopts.c b/src/emu/emuopts.c
index f4609d53a2c..e1142588300 100644
--- a/src/emu/emuopts.c
+++ b/src/emu/emuopts.c
@@ -549,7 +549,7 @@ const char *emu_options::main_value(astring &buffer, const char *name) const
const char *emu_options::sub_value(astring &buffer, const char *name, const char *subname) const
{
- astring tmp(",", subname, "=");
+ astring tmp = astring(",").cat(subname).cat("=");
buffer = value(name);
int pos = buffer.find(0, tmp.c_str());
if (pos != -1)