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-rw-r--r--libio/tst-wmemstream1.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libio/tst-wmemstream1.c b/libio/tst-wmemstream1.c
index 0c59c1adcb..f8b308bc6c 100644
--- a/libio/tst-wmemstream1.c
+++ b/libio/tst-wmemstream1.c
@@ -1,3 +1,5 @@
+#include <wchar.h>
+
 #define CHAR_T wchar_t
 #define W(o) L##o
 #define OPEN_MEMSTREAM open_wmemstream