1 files changed, 1 insertions, 1 deletions
diff --git a/src/hih61xx.c b/src/hih61xx.c
index cf00c04..92de893 100644
--- a/src/hih61xx.c
+++ b/src/hih61xx.c
@@ -152,7 +152,7 @@ void hih61xx_read_one(const uchar *opts)
                 break;
             }else{
                 if( !isdigit(*(opts+i)) ){              //# Check the register string
-                    printf("The Register address must be an integer!\n");
+                    fprintf(stderr, "The Register address must be an integer!\n");
                     print_help();
                     hih61xx_print_all();
                     exit (EXIT_FAILURE);