diff --git a/lang/funcs/cidr.go b/lang/funcs/cidr.go
index 2680790bb..6ce8aa9fa 100644
--- a/lang/funcs/cidr.go
+++ b/lang/funcs/cidr.go
@@ -10,7 +10,7 @@ import (
 	"github.com/zclconf/go-cty/cty/gocty"
 )
 
-//  CidrHostFunc contructs a function that calculates a full host IP address
+// CidrHostFunc contructs a function that calculates a full host IP address
 // within a given IP network address prefix.
 var CidrHostFunc = function.New(&function.Spec{
 	Params: []function.Parameter{
@@ -43,7 +43,7 @@ var CidrHostFunc = function.New(&function.Spec{
 	},
 })
 
-//  CidrNetmaskFunc contructs a function that converts an IPv4 address prefix given
+// CidrNetmaskFunc contructs a function that converts an IPv4 address prefix given
 // in CIDR notation into a subnet mask address.
 var CidrNetmaskFunc = function.New(&function.Spec{
 	Params: []function.Parameter{
@@ -63,7 +63,7 @@ var CidrNetmaskFunc = function.New(&function.Spec{
 	},
 })
 
-//  CidrSubnetFunc contructs a function that calculates a subnet address within
+// CidrSubnetFunc contructs a function that calculates a subnet address within
 // a given IP network address prefix.
 var CidrSubnetFunc = function.New(&function.Spec{
 	Params: []function.Parameter{
diff --git a/lang/funcs/collection.go b/lang/funcs/collection.go
index 27641150c..a28dd3eee 100644
--- a/lang/funcs/collection.go
+++ b/lang/funcs/collection.go
@@ -107,7 +107,7 @@ var LengthFunc = function.New(&function.Spec{
 	},
 })
 
-//  CoalesceListFunc contructs a function that takes any number of list arguments
+// CoalesceListFunc contructs a function that takes any number of list arguments
 // and returns the first one that isn't empty.
 var CoalesceListFunc = function.New(&function.Spec{
 	Params: []function.Parameter{},
@@ -159,7 +159,7 @@ var CoalesceListFunc = function.New(&function.Spec{
 	},
 })
 
-//  CompactFunc contructs a function that takes a list of strings and returns a new list
+// CompactFunc contructs a function that takes a list of strings and returns a new list
 // with any empty string elements removed.
 var CompactFunc = function.New(&function.Spec{
 	Params: []function.Parameter{
@@ -176,8 +176,6 @@ var CompactFunc = function.New(&function.Spec{
 		it := args[0].ElementIterator()
 		for it.Next() {
 			_, v := it.Element()
-			fmt.Println("ohai!")
-			fmt.Println(v.AsString())
 			if v.AsString() == "" {
 				continue
 			}
@@ -208,5 +206,5 @@ func CoalesceList(args ...cty.Value) (cty.Value, error) {
 // Compact takes a list of strings and returns a new list
 // with any empty string elements removed.
 func Compact(list cty.Value) (cty.Value, error) {
-	return CoalesceListFunc.Call([]cty.Value{list})
+	return CompactFunc.Call([]cty.Value{list})
 }
diff --git a/lang/funcs/collection_test.go b/lang/funcs/collection_test.go
index 0385e4c64..c963a2bef 100644
--- a/lang/funcs/collection_test.go
+++ b/lang/funcs/collection_test.go
@@ -339,6 +339,30 @@ func TestCompact(t *testing.T) {
 			}),
 			false,
 		},
+		{
+			cty.ListVal([]cty.Value{
+				cty.StringVal("test"),
+				cty.StringVal("test"),
+				cty.StringVal(""),
+			}),
+			cty.ListVal([]cty.Value{
+				cty.StringVal("test"),
+				cty.StringVal("test"),
+			}),
+			false,
+		},
+		{ // errrors on list of lists
+			cty.ListVal([]cty.Value{
+				cty.ListVal([]cty.Value{
+					cty.StringVal("test"),
+				}),
+				cty.ListVal([]cty.Value{
+					cty.StringVal(""),
+				}),
+			}),
+			cty.NilVal,
+			true,
+		},
 	}
 
 	for _, test := range tests {
diff --git a/lang/functions.go b/lang/functions.go
index fd69d9002..cc653e86c 100644
--- a/lang/functions.go
+++ b/lang/functions.go
@@ -44,7 +44,7 @@ func (s *Scope) Functions() map[string]function.Function {
 			"cidrsubnet":   funcs.CidrSubnetFunc,
 			"coalesce":     stdlib.CoalesceFunc,
 			"coalescelist": funcs.CoalesceListFunc,
-			"compact":      unimplFunc, // TODO
+			"compact":      funcs.CompactFunc,
 			"concat":       stdlib.ConcatFunc,
 			"contains":     unimplFunc, // TODO
 			"csvdecode":    stdlib.CSVDecodeFunc,