diff --git a/extra/udfhack/linux/lib_mysqludf_sys/Makefile b/extra/udfhack/linux/lib_mysqludf_sys/Makefile
index 4b15ab590..dfd7b197b 100644
--- a/extra/udfhack/linux/lib_mysqludf_sys/Makefile
+++ b/extra/udfhack/linux/lib_mysqludf_sys/Makefile
@@ -1,6 +1,9 @@
+# For MySQL < 5.1
 LIBDIR=/usr/lib
+# For MySQL >= 5.1
+#LIBDIR=/usr/lib/mysql/plugin
 
 install:
 	gcc -Wall -I/usr/include/mysql -O1 -shared lib_mysqludf_sys.c -o lib_mysqludf_sys.so
 	strip -sx lib_mysqludf_sys.so
-	sudo cp -f lib_mysqludf_sys.so $(LIBDIR)/lib_mysqludf_sys.so
+	cp -f lib_mysqludf_sys.so $(LIBDIR)/lib_mysqludf_sys.so
diff --git a/extra/udfhack/linux/lib_mysqludf_sys/install.sh b/extra/udfhack/linux/lib_mysqludf_sys/install.sh
index 64ad271a4..ff1080da9 100755
--- a/extra/udfhack/linux/lib_mysqludf_sys/install.sh
+++ b/extra/udfhack/linux/lib_mysqludf_sys/install.sh
@@ -29,7 +29,7 @@ make
 if test $? -ne 0; then
 	echo "ERROR: You need libmysqlclient development software installed"
 	echo "to be able to compile this UDF, on Debian/Ubuntu just run:"
-	echo "apt-get install libmysqlclient15-dev"
+	echo "apt-get install libmysqlclient-dev"
 	exit 1
 else
 	echo "MySQL UDF compiled successfully"
diff --git a/extra/udfhack/linux/lib_postgresqludf_sys/install.sh b/extra/udfhack/linux/lib_postgresqludf_sys/install.sh
index ed636efcb..53ee1f019 100755
--- a/extra/udfhack/linux/lib_postgresqludf_sys/install.sh
+++ b/extra/udfhack/linux/lib_postgresqludf_sys/install.sh
@@ -36,9 +36,9 @@ if test $? -ne 0; then
 
 	if test "${VERSION}" == "8.2"; then
 		echo "apt-get install postgresql-server-dev-8.2"
-	else if test "${VERSION}" == "8.3"; then
+	elif test "${VERSION}" == "8.3"; then
 		echo "apt-get install postgresql-server-dev-8.3"
-	else if test "${VERSION}" == "8.4"; then
+	elif test "${VERSION}" == "8.4"; then
 		echo "apt-get install postgresql-server-dev-8.4"
 	fi
 
diff --git a/udf/mysql/linux/lib_mysqludf_sys.so b/udf/mysql/linux/lib_mysqludf_sys.so
index 699065da3..422bd2c4f 100755
Binary files a/udf/mysql/linux/lib_mysqludf_sys.so and b/udf/mysql/linux/lib_mysqludf_sys.so differ
diff --git a/udf/postgresql/linux/8.3/lib_postgresqludf_sys.so b/udf/postgresql/linux/8.3/lib_postgresqludf_sys.so
index bb7cfa39c..3b7cebe1c 100755
Binary files a/udf/postgresql/linux/8.3/lib_postgresqludf_sys.so and b/udf/postgresql/linux/8.3/lib_postgresqludf_sys.so differ
diff --git a/udf/postgresql/linux/8.4/lib_postgresqludf_sys.so b/udf/postgresql/linux/8.4/lib_postgresqludf_sys.so
new file mode 100755
index 000000000..7cb3e6ead
Binary files /dev/null and b/udf/postgresql/linux/8.4/lib_postgresqludf_sys.so differ