diff --git a/v4l2/v4l2_pr_structs.c b/v4l2/v4l2_pr_structs.c
index 83d44e8c..bbc1e1f9 100644
--- a/v4l2/v4l2_pr_structs.c
+++ b/v4l2/v4l2_pr_structs.c
@@ -287,7 +287,7 @@ void pr_ctrl_id(uint32_t id)
 
 if (verbosity>1) fprintf(FP, "%08x : ", id);
 
-fprintf(FP, "%x %03x %04x", (id>>28)&0xf, 
+fprintf(FP, "%x %03lx %04x", (id>>28)&0xf,
 		V4L2_CTRL_ID2CLASS(id)>>16, id&0xffff);
 
 }