diff --git a/kenwood/kenwood.h b/kenwood/kenwood.h
index 08d3bff16..2593c38ee 100644
--- a/kenwood/kenwood.h
+++ b/kenwood/kenwood.h
@@ -111,7 +111,7 @@ extern rmode_t kenwood_mode_table[KENWOOD_MODE_TABLE_MAX];
 extern const tone_t kenwood38_ctcss_list[];
 extern const tone_t kenwood42_ctcss_list[];
 
-int kenwood_transaction(RIG *rig, const char *cmd, char *data, size_t data_len);
+int kenwood_transaction(RIG *rig, const char *cmdstr, char *data, size_t datasize);
 int kenwood_safe_transaction(RIG *rig, const char *cmd, char *buf,
                              size_t buf_size, size_t expected);