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-rw-r--r--src/dumm/guest.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/dumm/guest.c b/src/dumm/guest.c
index c4cc7f1fe..94ee83d18 100644
--- a/src/dumm/guest.c
+++ b/src/dumm/guest.c
@@ -328,7 +328,7 @@ static bool load_template(private_guest_t *this, char *path)
/**
* Implementation of gues_t.exec
*/
-static int exec(private_guest_t *this, void(*cb)(void*,char*), void *data,
+static int exec(private_guest_t *this, void(*cb)(void*,char*,size_t), void *data,
char *cmd, ...)
{
char buf[1024];