diff --git a/include/stdint.h b/include/stdint.h
index ec1566db..76619345 100644
--- a/include/stdint.h
+++ b/include/stdint.h
@@ -24,13 +24,17 @@
 #include <stddef.h>
 
 /* 7.18.1.1  Exact-width integer types */
+#if defined(__CYGWIN__)
+#include <sys/types.h>
+#else
 typedef signed char int8_t;
-typedef unsigned char   uint8_t;
 typedef short  int16_t;
-typedef unsigned short  uint16_t;
 typedef int  int32_t;
-typedef unsigned   uint32_t;
 typedef long long  int64_t;
+#endif
+typedef unsigned char   uint8_t;
+typedef unsigned short  uint16_t;
+typedef unsigned   uint32_t;
 typedef unsigned long long   uint64_t;
 
 /* 7.18.1.2  Minimum-width integer types */