Don't assume that errno will be implicitly available. Signed-off-by: Eric Blake <eblake(a)redhat.com&gt; --- src/tls.c | 1 + 1 file changed, 1 insertion(+) diff --git a/src/tls.c b/src/tls.c index 5d380e3..0e9ea11 100644 --- a/src/tls.c +++ b/src/tls.c @@ -38,6 +38,7 @@ #include <string.h> #include <unistd.h> #include <assert.h> +#include <errno.h> #include <pthread.h>