3 files changed, 8 insertions, 8 deletions
diff --git a/src/common/compat_threads.c b/src/common/compat_threads.c
index e8a97f1254..6adcaab956 100644
--- a/src/common/compat_threads.c
+++ b/src/common/compat_threads.c
@@ -403,5 +403,5 @@ atomic_counter_exchange(atomic_counter_t *counter, size_t newval)
   tor_mutex_release(&counter->mutex);
   return oldval;
 }
-#endif
+#endif /* !defined(HAVE_STDATOMIC_H) */
 
diff --git a/src/common/compat_threads.h b/src/common/compat_threads.h
index b452648ea5..ce86b15e9d 100644
--- a/src/common/compat_threads.h
+++ b/src/common/compat_threads.h
@@ -159,13 +159,13 @@ typedef struct atomic_counter_t {
   atomic_size_t val;
 } atomic_counter_t;
 #define ATOMIC_LINKAGE static
-#else
+#else /* !(defined(HAVE_STDATOMIC_H)) */
 typedef struct atomic_counter_t {
   tor_mutex_t mutex;
   size_t val;
 } atomic_counter_t;
 #define ATOMIC_LINKAGE
-#endif
+#endif /* defined(HAVE_STDATOMIC_H) */
 
 ATOMIC_LINKAGE void atomic_counter_init(atomic_counter_t *counter);
 ATOMIC_LINKAGE void atomic_counter_destroy(atomic_counter_t *counter);
@@ -214,8 +214,8 @@ atomic_counter_exchange(atomic_counter_t *counter, size_t newval)
   return atomic_exchange(&counter->val, newval);
 }
 
-#else
-#endif
+#else /* !(defined(HAVE_STDATOMIC_H)) */
+#endif /* defined(HAVE_STDATOMIC_H) */
 
 #endif /* !defined(TOR_COMPAT_THREADS_H) */
 
diff --git a/src/common/sandbox.c b/src/common/sandbox.c
index 92fdd60221..aec9857e94 100644
--- a/src/common/sandbox.c
+++ b/src/common/sandbox.c
@@ -429,9 +429,9 @@ libc_uses_openat_for_everything(void)
     return 1;
   else
     return 0;
-#else
+#else /* !(defined(CHECK_LIBC_VERSION)) */
   return 0;
-#endif
+#endif /* defined(CHECK_LIBC_VERSION) */
 }
 
 /** Allow a single file to be opened.  If <b>use_openat</b> is true,
@@ -1126,7 +1126,7 @@ sb_kill(scmp_filter_ctx ctx, sandbox_cfg_t *filter)
        SCMP_CMP(1, SCMP_CMP_EQ, 0));
 #else
   return 0;
-#endif
+#endif /* defined(__NR_kill) */
 }
 
 /**