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-rw-r--r--src/stdio/putwc.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/stdio/putwc.c b/src/stdio/putwc.c
index 80b54a47..4bb74733 100644
--- a/src/stdio/putwc.c
+++ b/src/stdio/putwc.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <wchar.h>
 
 wint_t putwc(wchar_t c, FILE *f)
 {