1 files changed, 2 insertions, 2 deletions
diff --git a/decoder.c b/decoder.c
index a5341b3..c494413 100644
--- a/decoder.c
+++ b/decoder.c
@@ -187,8 +187,8 @@ static int get_options(struct srd_decoder *d)
 			return SRD_ERR_PYTHON;
 		}
 		if (!(py_val = PyDict_GetItemString(py_opt, "id"))) {
-			srd_err("Protocol decoder %s option %d has no "
-					"id.", d->name);
+			srd_err("Protocol decoder %s option %zd has no "
+					"id.", d->name, opt);
 			return SRD_ERR_PYTHON;
 		}
 		o = g_malloc0(sizeof(struct srd_decoder_option));