diff --git a/wait-for b/wait-for
index 077a8d3..d5c5e92 100755
--- a/wait-for
+++ b/wait-for
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-TIMEOUT=15
+WAIT_TIMEOUT=15
 QUIET=0
 
 echoerr() {
@@ -21,8 +21,8 @@ USAGE
 
 wait_for() {
   command="$*"
-  for i in `seq $TIMEOUT` ; do
-    nc -z "$HOST" "$PORT" > /dev/null 2>&1
+  for i in `seq $WAIT_TIMEOUT` ; do
+    nc -z "$WAIT_HOST" "$WAIT_PORT" > /dev/null 2>&1
     
     result=$?
     if [ $result -eq 0 ] ; then
@@ -41,8 +41,8 @@ while [ $# -gt 0 ]
 do
   case "$1" in
     *:* )
-    HOST=$(printf "%s\n" "$1"| cut -d : -f 1)
-    PORT=$(printf "%s\n" "$1"| cut -d : -f 2)
+    WAIT_HOST=$(printf "%s\n" "$1"| cut -d : -f 1)
+    WAIT_PORT=$(printf "%s\n" "$1"| cut -d : -f 2)
     shift 1
     ;;
     -q | --quiet)
@@ -50,12 +50,12 @@ do
     shift 1
     ;;
     -t)
-    TIMEOUT="$2"
-    if [ "$TIMEOUT" = "" ]; then break; fi
+    WAIT_TIMEOUT="$2"
+    if [ "$WAIT_TIMEOUT" = "" ]; then break; fi
     shift 2
     ;;
     --timeout=*)
-    TIMEOUT="${1#*=}"
+    WAIT_TIMEOUT="${1#*=}"
     shift 1
     ;;
     --)
@@ -72,7 +72,7 @@ do
   esac
 done
 
-if [ "$HOST" = "" -o "$PORT" = "" ]; then
+if [ "$WAIT_HOST" = "" -o "$WAIT_PORT" = "" ]; then
   echoerr "Error: you need to provide a host and port to test."
   usage 2
 fi