Make the compiler happy and use a puts
diff --git a/openbsc/src/bsc_hack.c b/openbsc/src/bsc_hack.c
index edc93d9..f18f7f8 100644
--- a/openbsc/src/bsc_hack.c
+++ b/openbsc/src/bsc_hack.c
@@ -91,7 +91,7 @@
 
 static void print_copyright()
 {
-	printf(openbsc_copyright);
+	puts(openbsc_copyright);
 }
 
 static void handle_options(int argc, char** argv)