1 files changed, 2 insertions, 0 deletions
diff --git a/tsd.c b/tsd.c
index 599ef73..02069a9 100644
--- a/tsd.c
+++ b/tsd.c
@@ -5,6 +5,8 @@
  * POSIX thread functions which implement thread-specific data (TSD).
  */
 
+#include <errno.h>
+
 #include "pthread.h"
 #include "implement.h"