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-rw-r--r--src/stdlib/wcstod.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/stdlib/wcstod.c b/src/stdlib/wcstod.c
index 03670b0b..83f308d3 100644
--- a/src/stdlib/wcstod.c
+++ b/src/stdlib/wcstod.c
@@ -1,6 +1,7 @@
 #include "shgetc.h"
 #include "floatscan.h"
 #include "stdio_impl.h"
+#include <wctype.h>
 
 /* This read function heavily cheats. It knows:
  *  (1) len will always be 1