diff --git a/src/managesieve-login/managesieve-login-settings-plugin.c b/src/managesieve-login/managesieve-login-settings-plugin.c
index c4a6849916e301e82cc495f4be2a51a698114b52..8ede09a00643fb6275d6eb167ba1d6362c750f8e 100644
--- a/src/managesieve-login/managesieve-login-settings-plugin.c
+++ b/src/managesieve-login/managesieve-login-settings-plugin.c
@@ -124,7 +124,7 @@ static bool capability_dump(void)
 	}
 
 	if ( pid == 0 ) {
-		const char *argv[2];
+		const char *argv[3];
 
 		/* Child */
 		(void)close(fd[0]);