diff --git a/make/ChangeLog b/make/ChangeLog
index 4141519882..723fa374a7 100644
--- a/make/ChangeLog
+++ b/make/ChangeLog
@@ -1,3 +1,8 @@
+2004-04-09	Ralf Corsepius <ralf_corsepius@rtems.org>
+
+	* make/Cygwin-posix.cfg: Remove DEFINES + LIBC_DEFINES (Meaningless
+	with Cygwin and now unused).
+
 2004-04-09	Ralf Corsepius <ralf_corsepius@rtems.org>
 
 	* make/Linux-posix.cfg: Merge LIBC_DEFINES into CPU_CFLAGS.
diff --git a/make/custom/Cygwin-posix.cfg b/make/custom/Cygwin-posix.cfg
index bbc5b0f4ba..853f0c61a7 100644
--- a/make/custom/Cygwin-posix.cfg
+++ b/make/custom/Cygwin-posix.cfg
@@ -14,10 +14,6 @@ RTEMS_BSP_FAMILY=posix
 
 include $(RTEMS_ROOT)/make/custom/default.cfg
 
-LIBC_DEFINES =-D_POSIX_C_SOURCE
-
-DEFINES += -D_BSD_SOURCE
-
 # optimize flag: typically -0, could use -O4 or -fast
 # -O4 is ok for RTEMS
 CFLAGS_OPTIMIZE_V = -O2