diff --git a/misc/fts.c b/misc/fts.c
index 9fbefe3..27e9c42 100644
--- a/misc/fts.c
+++ b/misc/fts.c
@@ -61,6 +61,12 @@ static char sccsid[] = "@(#)fts.c	8.6 (Berkeley) 8/14/94";
 #   define _STAT_VER		0
 #   define __fxstat64(_stat_ver, _fd, _sbp) fstat64((_fd), (_sbp))
 #endif
+#if defined(__CYGWIN__)
+#   define __errno_location() 	(&errno)
+#   define stat64		stat
+#   define _STAT_VER		0
+#   define __fxstat64(_stat_ver, _fd, _sbp)	fstat((_fd), (_sbp))
+#endif
 #include "system.h"
 #include <stdlib.h>
 #include <string.h>
diff --git a/misc/fts.h b/misc/fts.h
index 47c650e..a1ed262 100644
--- a/misc/fts.h
+++ b/misc/fts.h
@@ -53,6 +53,10 @@
 # define	_LARGEFILE64_SOURCE
 #endif
 
+#if defined(__CYGWIN__)
+# define _D_EXACT_NAMLEN(d) (strlen ((d)->d_name))
+#endif
+
 #if defined(sun)
 # define _D_EXACT_NAMLEN(d) ((d)->d_reclen)
 #endif
diff --git a/rpmdb.c b/rpmdb.c
index 7223fdf..53e95f5 100644
--- a/rpmdb.c
+++ b/rpmdb.c
@@ -5,7 +5,7 @@
 #include "cliutils.h"
 #include "debug.h"
 
-#if !defined(__GLIBC__) && !defined(__APPLE__)
+#if !defined(__GLIBC__) && !defined(__APPLE__) && !defined(__CYGWIN__)
 char ** environ = NULL;
 #endif
 
diff --git a/rpmkeys.c b/rpmkeys.c
index fa4e4d8..42416d7 100644
--- a/rpmkeys.c
+++ b/rpmkeys.c
@@ -5,7 +5,7 @@
 #include "cliutils.h"
 #include "debug.h"
 
-#if !defined(__GLIBC__) && !defined(__APPLE__)
+#if !defined(__GLIBC__) && !defined(__APPLE__) && !defined(__CYGWIN__)
 char ** environ = NULL;
 #endif
 
diff --git a/rpmsign.c b/rpmsign.c
index e29864e..868cd78 100644
--- a/rpmsign.c
+++ b/rpmsign.c
@@ -8,7 +8,7 @@
 #include "cliutils.h"
 #include "debug.h"
 
-#if !defined(__GLIBC__) && !defined(__APPLE__)
+#if !defined(__GLIBC__) && !defined(__APPLE__) && !defined(__CYGWIN__)
 char ** environ = NULL;
 #endif
 
diff --git a/sign/rpmgensig.c b/sign/rpmgensig.c
index 7695ffa..13d7fd9 100644
--- a/sign/rpmgensig.c
+++ b/sign/rpmgensig.c
@@ -22,7 +22,7 @@
 
 #include "debug.h"
 
-#if !defined(__GLIBC__) && !defined(__APPLE__)
+#if !defined(__GLIBC__) && !defined(__APPLE__) && !defined(__CYGWIN__)
 char ** environ = NULL;
 #endif
 
diff --git a/system.h b/system.h
index 0037244..5f69d75 100644
--- a/system.h
+++ b/system.h
@@ -119,11 +119,13 @@ typedef	char * security_context_t;
 #define	setprogname(pn)
 #else
 #define	__progname	program_name
+#if !defined(__CYGWIN__)
 #define	setprogname(pn)	\
   { if ((__progname = strrchr(pn, '/')) != NULL) __progname++; \
     else __progname = pn;		\
   }
 #endif
+#endif
 extern const char *__progname;
 
 /* Take care of NLS matters.  */