diff --git a/examples/testclient-promisc.c b/examples/testclient-promisc.c
index 4fe24ab..03e774b 100644
--- a/examples/testclient-promisc.c
+++ b/examples/testclient-promisc.c
@@ -80,13 +80,15 @@ int main(int argc, char **argv) {
         patty_ax25_frame frame;
 
         if (patty_ax25_frame_decode(&frame, PATTY_AX25_FRAME_NORMAL, buf, readlen) < 0) {
-            perror("Unable to decode frame");
+            fprintf(stderr, "%s: %s: %s\n",
+                argv[0], "patty_ax25_frame_decode()", strerror(errno));
 
             goto error_ax25_frame_decode;
         }
 
         if (patty_print_frame(stdout, &frame, buf, readlen) < 0) {
-            perror("Unable to print frame");
+            fprintf(stderr, "%s: %s: %s\n",
+                argv[0], "patty_print_frame()", strerror(errno));
 
             goto error_print_frame;
         }