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-rw-r--r--linuxthreads/ptfork.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/linuxthreads/ptfork.c b/linuxthreads/ptfork.c
index deb347fe29..564f8d7c75 100644
--- a/linuxthreads/ptfork.c
+++ b/linuxthreads/ptfork.c
@@ -20,6 +20,7 @@
 #include <unistd.h>
 #include "pthread.h"
 #include "internals.h"
+#include <bits/libc-lock.h>
 
 struct handler_list {
   void (*handler)(void);