diff --git a/libdc/src/internal.h b/libdc/src/internal.h
index 620a290..bc9ef29 100644
--- a/libdc/src/internal.h
+++ b/libdc/src/internal.h
@@ -25,7 +25,11 @@
 #include <dc/refable.h>
 #include <dc/account.h>
 
-#define DEBUG
+/* For internal debugging only. Please note that the client will then begin to
+ * write text files everywhere filled with all sorts of private information. Use
+ * with caution.
+ */
+/*#define DEBUG*/
 
 #define return_if_true(v,r) do { if (v) return r; } while(0)
 #define goto_if_true(v,l) do { if (v) goto l; } while(0)
diff --git a/libdc/src/session.c b/libdc/src/session.c
index 36394c4..a467435 100644
--- a/libdc/src/session.c
+++ b/libdc/src/session.c
@@ -182,12 +182,14 @@ static void dc_session_handler(dc_gateway_t gw, dc_event_t e, void *p)
         h(s, e);
     }
 
+#ifdef DEBUG
     char *str = NULL;
     str = json_dumps(dc_event_payload(e), 0);
     FILE *f = fopen("events.txt", "a+");
     fprintf(f, "%s: %s\n", dc_event_type(e), str);
     free(str);
     fclose(f);
+#endif
 }
 
 dc_session_t dc_session_new(dc_loop_t loop)
diff --git a/ncdc/src/mainwindow.c b/ncdc/src/mainwindow.c
index d50d831..778a845 100644
--- a/ncdc/src/mainwindow.c
+++ b/ncdc/src/mainwindow.c
@@ -382,16 +382,20 @@ void ncdc_mainwindow_input_ready(ncdc_mainwindow_t n)
         }
         keylen = wcslen(key);
 
+#if 0
         FILE *f = fopen("keys.txt", "a+");
         fwprintf(f, L"KEY: %02X %ls\n",
                  key[0], &key[1]
             );
         fclose(f);
+#endif
     }
 
+#if 0
     FILE *f = fopen("keys.txt", "a+");
     fwprintf(f, L"%X\n", i);
     fclose(f);
+#endif
 
     if (key != NULL &&
         (k = ncdc_find_keybinding(keys_global, key, keylen)) != NULL) {