diff --git a/complete_helper.go b/complete_helper.go
index f609d44..58d7248 100644
--- a/complete_helper.go
+++ b/complete_helper.go
@@ -5,6 +5,9 @@ import (
 	"strings"
 )
 
+// Caller type for dynamic completion
+type DynamicCompleteFunc func(string) []string
+
 type PrefixCompleterInterface interface {
 	Print(prefix string, level int, buf *bytes.Buffer)
 	Do(line []rune, pos int) (newLine [][]rune, length int)
@@ -13,8 +16,16 @@ type PrefixCompleterInterface interface {
 	SetChildren(children []PrefixCompleterInterface)
 }
 
+type DynamicPrefixCompleterInterface interface {
+	PrefixCompleterInterface
+	IsDynamic() bool
+	GetDynamicNames(line []rune) [][]rune
+}
+
 type PrefixCompleter struct {
 	Name     []rune
+	Dynamic  bool
+	Callback DynamicCompleteFunc
 	Children []PrefixCompleterInterface
 }
 
@@ -44,10 +55,22 @@ func (p *PrefixCompleter) Print(prefix string, level int, buf *bytes.Buffer) {
 	Print(p, prefix, level, buf)
 }
 
+func (p *PrefixCompleter) IsDynamic() bool {
+	return p.Dynamic
+}
+
 func (p *PrefixCompleter) GetName() []rune {
 	return p.Name
 }
 
+func (p *PrefixCompleter) GetDynamicNames(line []rune) [][]rune {
+	var names = [][]rune{}
+	for _, name := range p.Callback(string(line)) {
+		names = append(names, []rune(name+" "))
+	}
+	return names
+}
+
 func (p *PrefixCompleter) GetChildren() []PrefixCompleterInterface {
 	return p.Children
 }
@@ -64,36 +87,59 @@ func PcItem(name string, pc ...PrefixCompleterInterface) *PrefixCompleter {
 	name += " "
 	return &PrefixCompleter{
 		Name:     []rune(name),
+		Dynamic:  false,
+		Children: pc,
+	}
+}
+
+func PcItemDynamic(callback DynamicCompleteFunc, pc ...PrefixCompleterInterface) *PrefixCompleter {
+	return &PrefixCompleter{
+		Callback: callback,
+		Dynamic:  true,
 		Children: pc,
 	}
 }
 
 func (p *PrefixCompleter) Do(line []rune, pos int) (newLine [][]rune, offset int) {
-	return Do(p, line, pos)
+	return doInternal(p, line, pos, line)
 }
 
 func Do(p PrefixCompleterInterface, line []rune, pos int) (newLine [][]rune, offset int) {
+	return doInternal(p, line, pos, line)
+}
+
+func doInternal(p PrefixCompleterInterface, line []rune, pos int, origLine []rune) (newLine [][]rune, offset int) {
 	line = runes.TrimSpaceLeft(line[:pos])
 	goNext := false
 	var lineCompleter PrefixCompleterInterface
 	for _, child := range p.GetChildren() {
-		childName := child.GetName()
-		if len(line) >= len(childName) {
-			if runes.HasPrefix(line, childName) {
-				if len(line) == len(childName) {
-					newLine = append(newLine, []rune{' '})
-				} else {
-					newLine = append(newLine, childName)
-				}
-				offset = len(childName)
-				lineCompleter = child
-				goNext = true
-			}
+		childNames := make([][]rune, 1)
+
+		childDynamic, ok := child.(DynamicPrefixCompleterInterface)
+		if ok && childDynamic.IsDynamic() {
+			childNames = childDynamic.GetDynamicNames(origLine)
 		} else {
-			if runes.HasPrefix(childName, line) {
-				newLine = append(newLine, childName[len(line):])
-				offset = len(line)
-				lineCompleter = child
+			childNames[0] = child.GetName()
+		}
+
+		for _, childName := range childNames {
+			if len(line) >= len(childName) {
+				if runes.HasPrefix(line, childName) {
+					if len(line) == len(childName) {
+						newLine = append(newLine, []rune{' '})
+					} else {
+						newLine = append(newLine, childName)
+					}
+					offset = len(childName)
+					lineCompleter = child
+					goNext = true
+				}
+			} else {
+				if runes.HasPrefix(childName, line) {
+					newLine = append(newLine, childName[len(line):])
+					offset = len(line)
+					lineCompleter = child
+				}
 			}
 		}
 	}
@@ -109,11 +155,11 @@ func Do(p PrefixCompleterInterface, line []rune, pos int) (newLine [][]rune, off
 		}
 
 		tmpLine = append(tmpLine, line[i:]...)
-		return lineCompleter.Do(tmpLine, len(tmpLine))
+		return doInternal(lineCompleter, tmpLine, len(tmpLine), origLine)
 	}
 
 	if goNext {
-		return lineCompleter.Do(nil, 0)
+		return doInternal(lineCompleter, nil, 0, origLine)
 	}
 	return
 }
diff --git a/example/readline-demo/readline-demo.go b/example/readline-demo/readline-demo.go
index eeb3605..d80e59e 100644
--- a/example/readline-demo/readline-demo.go
+++ b/example/readline-demo/readline-demo.go
@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"io"
+	"io/ioutil"
 	"log"
 	"strconv"
 	"strings"
@@ -16,6 +17,18 @@ func usage(w io.Writer) {
 	io.WriteString(w, completer.Tree("    "))
 }
 
+// Function constructor - constructs new function for listing given directory
+func listFiles(path string) func(string) []string {
+	return func(line string) []string {
+		names := make([]string, 0)
+		files, _ := ioutil.ReadDir(path)
+		for _, f := range files {
+			names = append(names, f.Name())
+		}
+		return names
+	}
+}
+
 var completer = readline.NewPrefixCompleter(
 	readline.PcItem("mode",
 		readline.PcItem("vi"),
@@ -23,6 +36,12 @@ var completer = readline.NewPrefixCompleter(
 	),
 	readline.PcItem("login"),
 	readline.PcItem("say",
+		readline.PcItemDynamic(listFiles("./"),
+			readline.PcItem("with",
+				readline.PcItem("following"),
+				readline.PcItem("items"),
+			),
+		),
 		readline.PcItem("hello"),
 		readline.PcItem("bye"),
 	),
@@ -119,7 +138,7 @@ func main() {
 				break
 			}
 			go func() {
-				for _ = range time.Tick(time.Second) {
+				for range time.Tick(time.Second) {
 					log.Println(line)
 				}
 			}()