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-rw-r--r--sysdeps/generic/stdio-lock.h1
-rw-r--r--sysdeps/nptl/stdio-lock.h1
2 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/generic/stdio-lock.h b/sysdeps/generic/stdio-lock.h
index 532bb5f23f..763c7d465a 100644
--- a/sysdeps/generic/stdio-lock.h
+++ b/sysdeps/generic/stdio-lock.h
@@ -22,6 +22,7 @@
 #include <libc-lock.h>
 
 __libc_lock_define_recursive (typedef, _IO_lock_t)
+#define _IO_lock_t_defined 1
 
 /* We need recursive (counting) mutexes.  */
 #ifdef _LIBC_LOCK_RECURSIVE_INITIALIZER
diff --git a/sysdeps/nptl/stdio-lock.h b/sysdeps/nptl/stdio-lock.h
index 35d6ce0a29..df749062ea 100644
--- a/sysdeps/nptl/stdio-lock.h
+++ b/sysdeps/nptl/stdio-lock.h
@@ -27,6 +27,7 @@
 #define _IO_lock_inexpensive	1
 
 typedef struct { int lock; int cnt; void *owner; } _IO_lock_t;
+#define _IO_lock_t_defined 1
 
 #define _IO_lock_initializer { LLL_LOCK_INITIALIZER, 0, NULL }