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-rw-r--r--include/osmocom/core/utils.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/osmocom/core/utils.h b/include/osmocom/core/utils.h
index f27359cb..f429ba6c 100644
--- a/include/osmocom/core/utils.h
+++ b/include/osmocom/core/utils.h
@@ -155,7 +155,7 @@ int osmo_print_n(char *buf, size_t bufsize, const char *str, size_t n);
uint32_t osmo_isqrt32(uint32_t x);
-const char osmo_luhn(const char* in, int in_len);
+char osmo_luhn(const char* in, int in_len);
/*! State for OSMO_STRBUF_APPEND() and OSMO_STRBUF_PRINTF(). See there for examples. */
struct osmo_strbuf {