diff --git a/src/decode.c b/src/decode.c
index f9c33ca..0bef839 100644
--- a/src/decode.c
+++ b/src/decode.c
@@ -32,6 +32,45 @@ static int callsign_fprint(FILE *stream, const patty_ax25_address *address) {
     return 0;
 }
 
+static int hexdump_fprint(FILE *stream, void *data, size_t len) {
+    size_t i;
+
+    for (i=0; i<len; i++) {
+        if (i % 16 == 0) {
+            if (i) {
+                if (fprintf(stderr, "\n") < 0) {
+                    goto error_fprintf;
+                }
+            }
+
+            if (fprintf(stderr, "%08lx: ", i) < 0) {
+                goto error_fprintf;
+            }
+        }
+
+        if (fprintf(stderr, "%02x", ((uint8_t *)data)[i]) < 0) {
+            goto error_fprintf;
+        }
+
+        if (i % 2) {
+            if (fprintf(stderr, " ") < 0) {
+                goto error_fprintf;
+            }
+        }
+    }
+
+    if (i) {
+        if (fprintf(stderr, "\n") < 0) {
+            goto error_fprintf;
+        }
+    }
+
+    return 0;
+
+error_fprintf:
+    return -1;
+}
+
 static int address_fprint(FILE *stream, const patty_ax25_frame *frame) {
     int i;
 
@@ -87,6 +126,8 @@ int main(int argc, char **argv) {
         }
 
         fprintf(stderr, " %ld bytes\n", len);
+
+        hexdump_fprint(stderr, data, len);
     }
 
     patty_kiss_tnc_close(tnc);