diff --git a/epan/dissectors/packet-frame.c b/epan/dissectors/packet-frame.c
index 292173c2e5..52592d54ff 100644
--- a/epan/dissectors/packet-frame.c
+++ b/epan/dissectors/packet-frame.c
@@ -680,11 +680,12 @@ dissect_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void*
 			if (!(decoded[byte] & (1 << bit))) {
 				field_info* fi = proto_find_field_from_offset(tree, i, tvb);
 				if (fi && fi->hfinfo->id != proto_frame) {
-					g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_WARNING,
-						"Dissector %s incomplete in frame %u: undecoded byte number %u "
-						"(0x%.4X+%u)",
-						(fi ? fi->hfinfo->abbrev : "[unknown]"),
-						pinfo->num, i, i - i % 16, i % 16);
+					if (prefs.incomplete_dissectors_check_debug)
+						g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_WARNING,
+							"Dissector %s incomplete in frame %u: undecoded byte number %u "
+							"(0x%.4X+%u)",
+							(fi ? fi->hfinfo->abbrev : "[unknown]"),
+							pinfo->num, i, i - i % 16, i % 16);
 					proto_tree_add_expert_format(tree, pinfo, &ei_incomplete, tvb, i, 1, "Undecoded byte number: %u (0x%.4X+%u)", i, i - i % 16, i % 16);
 				}
 			}
diff --git a/epan/prefs.c b/epan/prefs.c
index 34bcd1fe7b..3f1677115a 100644
--- a/epan/prefs.c
+++ b/epan/prefs.c
@@ -2518,6 +2518,11 @@ prefs_register_modules(void)
     prefs_register_uint_custom_preference(console_module, "log.level", "logging level",
         "A bitmask of GLib log levels", &custom_cbs, &prefs.console_log_level);
 
+    prefs_register_bool_preference(console_module, "incomplete_dissectors_check_debug",
+                                   "Print debug line for incomplete dissectors",
+                                   "Look for dissectors that left some bytes undecoded (debug)",
+                                   &prefs.incomplete_dissectors_check_debug);
+
     /* Capture
      * These are preferences that can be read/written using the
      * preference module API.  These preferences still use their own
diff --git a/epan/prefs.h b/epan/prefs.h
index 095a2ce873..f18cf85f1d 100644
--- a/epan/prefs.h
+++ b/epan/prefs.h
@@ -215,6 +215,7 @@ typedef struct _e_prefs {
   gboolean     display_hidden_proto_items;
   gboolean     display_byte_fields_with_spaces;
   gboolean     enable_incomplete_dissectors_check;
+  gboolean     incomplete_dissectors_check_debug;
   gpointer     filter_expressions;/* Actually points to &head */
   gboolean     gui_update_enabled;
   software_update_channel_e gui_update_channel;