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-rw-r--r--src/devices/cpu/i4004/i4004.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/devices/cpu/i4004/i4004.cpp b/src/devices/cpu/i4004/i4004.cpp
index 62a4f9efbca..d4ba8891260 100644
--- a/src/devices/cpu/i4004/i4004.cpp
+++ b/src/devices/cpu/i4004/i4004.cpp
@@ -506,7 +506,7 @@ void i4004_cpu_device::state_export(const device_state_entry &entry)
}
}
-void i4004_cpu_device::state_string_export(const device_state_entry &entry, std::string &str)
+void i4004_cpu_device::state_string_export(const device_state_entry &entry, std::string &str) const
{
switch (entry.index())
{