diff --git a/debian/libwsutil0.symbols b/debian/libwsutil0.symbols
index 22e98365f8..7ef14ee6d2 100644
--- a/debian/libwsutil0.symbols
+++ b/debian/libwsutil0.symbols
@@ -356,6 +356,7 @@ libwsutil.so.0 libwsutil0 #MINVER#
  ws_log_set_fatal_str@Base 3.5.0
  ws_log_set_level@Base 3.5.0
  ws_log_set_level_str@Base 3.5.0
+ ws_log_write_always_full@Base 3.5.0
  ws_logv@Base 3.5.0
  ws_logv_full@Base 3.5.0
  ws_mempbrk_compile@Base 1.99.4
diff --git a/epan/crypt/dot11decrypt_debug.h b/epan/crypt/dot11decrypt_debug.h
index 2dd15ab72b..ba43af19de 100644
--- a/epan/crypt/dot11decrypt_debug.h
+++ b/epan/crypt/dot11decrypt_debug.h
@@ -27,7 +27,7 @@ debug_dump(const char *file, int line, const char* func,
     if (!ws_log_msg_is_active(WS_LOG_DOMAIN, level))
         return;
     char* tmp_str = bytes_to_str(NULL, y, (z));
-    ws_log_full(WS_LOG_DOMAIN, level, file, line, func, "%s: %s", x, tmp_str);
+    ws_log_write_always_full(WS_LOG_DOMAIN, level, file, line, func, "%s: %s", x, tmp_str);
     wmem_free(NULL, tmp_str);
 }
 
diff --git a/wsutil/wslog.c b/wsutil/wslog.c
index 2c7cef99ae..d6442c61dc 100644
--- a/wsutil/wslog.c
+++ b/wsutil/wslog.c
@@ -896,6 +896,18 @@ void ws_log_full(const char *domain, enum ws_log_level level,
 }
 
 
+void ws_log_write_always_full(const char *domain, enum ws_log_level level,
+                    const char *file, int line, const char *func,
+                    const char *format, ...)
+{
+    va_list ap;
+
+    va_start(ap, format);
+    log_write_dispatch(domain, level, file, line, func, format, ap);
+    va_end(ap);
+}
+
+
 void ws_log_default_writer(const char *domain, enum ws_log_level level,
                             ws_log_time_t timestamp,
                             const char *file, int line, const char *func,
diff --git a/wsutil/wslog.h b/wsutil/wslog.h
index 65d0db4385..f656d4fb22 100644
--- a/wsutil/wslog.h
+++ b/wsutil/wslog.h
@@ -296,6 +296,19 @@ void ws_logv_full(const char *domain, enum ws_log_level level,
 #define ws_noisy(...)    _LOG_DEBUG(LOG_LEVEL_NOISY, __VA_ARGS__)
 
 
+/** Auxiliary function to write custom logging functions.
+ *
+ * This function is the same as ws_log_full() but does not perform any
+ * domain/level filtering to avoid a useless double activation check.
+ * It should only be used in conjunction with a pre-check using
+ * ws_log_msg_is_active().
+ */
+WS_DLL_PUBLIC
+void ws_log_write_always_full(const char *domain, enum ws_log_level level,
+                    const char *file, int line, const char *func,
+                    const char *format, ...) G_GNUC_PRINTF(6,7);
+
+
 /** Define an auxiliary file pointer where messages should be written.
  *
  * This file, if set, functions in addition to the registered or