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-rw-r--r--stdio/test_rdwr.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/stdio/test_rdwr.c b/stdio/test_rdwr.c
index 8e0c1dfade..f987f16cd4 100644
--- a/stdio/test_rdwr.c
+++ b/stdio/test_rdwr.c
@@ -17,6 +17,7 @@ not, write to the Free Software Foundation, Inc., 675 Mass Ave,
 Cambridge, MA 02139, USA.  */
 
 #include <ansidecl.h>
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>