diff --git a/src/template.c b/src/template.c
index 10a6aa5..b567b4f 100644
--- a/src/template.c
+++ b/src/template.c
@@ -220,8 +220,9 @@ main(void)
 		sizeof(uint8_t));
 	if (BLOCK_SIZE < 1) {
 # if !SILENT_MODE
-		printf("The block size " INT2STR(BLOCK_SIZE_BYTES) " is too small, "
-		       "should be at least %" PRIuMAX " bytes\n", MINIMUM_BLOCK_SIZE);
+		fprintf(stderr, "The block size " INT2STR(BLOCK_SIZE_BYTES) " is too "
+		        "small, should be at least %" PRIuMAX " bytes\n",
+		        MINIMUM_BLOCK_SIZE);
 # endif
 		return EXIT_FAILURE;
 	}