diff --git a/src/shared/log.c b/src/shared/log.c
index c654b86228..2404de85e3 100644
--- a/src/shared/log.c
+++ b/src/shared/log.c
@@ -713,6 +713,7 @@ _noreturn_ void log_assert_failed_unreachable(const char *text, const char *file
 }
 
 void log_assert_failed_return(const char *text, const char *file, int line, const char *func) {
+        PROTECT_ERRNO;
         log_assert(LOG_DEBUG, text, file, line, func, "Assertion '%s' failed at %s:%u, function %s(). Ignoring.");
 }