1 files changed, 5 insertions, 1 deletions

diff --git a/src/alloc.c b/src/alloc.c
index adbfa1883c5..0b387dd8c1b 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -732,7 +732,11 @@ static void
 malloc_unblock_input (void)
 {
   if (block_input_in_memory_allocators)
-    unblock_input ();
+    {
+      int err = errno;
+      unblock_input ();
+      errno = err;
+    }
 }
 # define MALLOC_BLOCK_INPUT malloc_block_input ()
 # define MALLOC_UNBLOCK_INPUT malloc_unblock_input ()