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-rw-r--r--src/common/util.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/common/util.c b/src/common/util.c
index f7baab0791..037acad87b 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -3538,7 +3538,7 @@ finish_daemon(const char *cp)
/** Write the current process ID, followed by NL, into <b>filename</b>.
*/
void
-write_pidfile(char *filename)
+write_pidfile(const char *filename)
{
FILE *pidfile;