diff --git a/configure b/configure
index f1ea7a88..268e936d 100755
--- a/configure
+++ b/configure
@@ -2452,7 +2452,6 @@ case "${host_os}" in
 		appendInc -I/usr/local/include
 		appendLib -L/usr/local/lib -lcompat
 		MODFLAGS="$MODFLAGS -L/usr/local/lib"
-		appendCXX -D__GNU_LIBRARY__
 	;;
 	solaris*)
 		appendLib -lsocket -lnsl
diff --git a/configure.in b/configure.in
index 327dac3d..7eca1773 100644
--- a/configure.in
+++ b/configure.in
@@ -46,7 +46,6 @@ case "${host_os}" in
 		appendInc -I/usr/local/include
 		appendLib -L/usr/local/lib -lcompat
 		MODFLAGS="$MODFLAGS -L/usr/local/lib"
-		appendCXX -D__GNU_LIBRARY__
 	;;
 	solaris*)
 		appendLib -lsocket -lnsl