diff --git a/AUTHORS b/AUTHORS
index fc9bd513..ad647112 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -65,6 +65,7 @@ Joe Thornber
 Jon Dyte
 Kamil Shakirov
 Ken Steele
+Kouhei Sutou
 Laurent Alebarde
 Leonardo J. Consoni
 Lourens Naudé
diff --git a/src/tweetnacl.c b/src/tweetnacl.c
index 666a864f..7095d5cc 100644
--- a/src/tweetnacl.c
+++ b/src/tweetnacl.c
@@ -852,7 +852,7 @@ int crypto_sign_open(u8 *m,u64 *mlen,const u8 *sm,u64 n,const u8 *pk)
 #ifdef ZMQ_HAVE_WINDOWS
 
 #include <windows.h>
-#include <WinCrypt.h>
+#include <wincrypt.h>
 
 #define NCP ((HCRYPTPROV) 0)