1 files changed, 1 insertions, 1 deletions

diff --git a/src/util/testpkg.c b/src/util/testpkg.c
index 0dd8db8f..d0d9cac1 100644
--- a/src/util/testpkg.c
+++ b/src/util/testpkg.c
@@ -24,7 +24,7 @@
 
 #define BASENAME "testpkg"
 
-static void output_cb(pmloglevel_t level, char *fmt, va_list args)
+static void output_cb(pmloglevel_t level, const char *fmt, va_list args)
 {
 	if(fmt[0] == '\0') {
 		return;