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-rw-r--r--src/emu/device.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/emu/device.cpp b/src/emu/device.cpp
index 42edf893168..5dc0366d99e 100644
--- a/src/emu/device.cpp
+++ b/src/emu/device.cpp
@@ -852,7 +852,7 @@ device_t *device_t::subdevice_slow(const char *tag) const
// we presume the result is a rooted path; also doubled colons mess up our
// tree walk, so catch them early
assert(fulltag[0] == ':');
- assert(fulltag.find("::") == -1);
+ assert(fulltag.find("::") == std::string::npos);
// walk the device list to the final path
device_t *curdevice = &mconfig().root_device();