diff --git a/src/basic/log-context.c b/src/basic/log-context.c
index fd40c055a4..27bce6f1f6 100644
--- a/src/basic/log-context.c
+++ b/src/basic/log-context.c
@@ -11,8 +11,8 @@
 #include "strv.h"
 
 static int saved_log_context_enabled = -1;
-thread_local LIST_HEAD(LogContext, _log_context) = NULL;
-thread_local size_t _log_context_num_fields = 0;
+static thread_local LIST_HEAD(LogContext, _log_context) = NULL;
+static thread_local size_t _log_context_num_fields = 0;
 
 bool log_context_enabled(void) {
         int r;