diff --git a/parser.go b/parser.go
index 0af33fd..617d167 100644
--- a/parser.go
+++ b/parser.go
@@ -4,6 +4,7 @@ import (
 	"io"
 	"io/ioutil"
 	"encoding/json"
+	"strings"
 )
 
 type state struct {
@@ -36,7 +37,8 @@ func (s *state) instances() map[string]instanceState {
 	for _, m := range s.Modules {
 		for k, r := range m.Resources {
 			if r.Type == "aws_instance" {
-				inst[k] = r.Primary
+				name := strings.TrimPrefix(k, "aws_instance.")
+				inst[name] = r.Primary
 			}
 		}
 	}
diff --git a/parser_test.go b/parser_test.go
index 6a23eca..0387020 100644
--- a/parser_test.go
+++ b/parser_test.go
@@ -111,6 +111,6 @@ func TestInstances(t *testing.T) {
 
 	inst := s.instances()
 	assert.Equal(t, 2, len(inst))
-	assert.Equal(t, "i-aaaaaaaa", inst["aws_instance.one"].ID)
-	assert.Equal(t, "i-bbbbbbbb", inst["aws_instance.two"].ID)
+	assert.Equal(t, "i-aaaaaaaa", inst["one"].ID)
+	assert.Equal(t, "i-bbbbbbbb", inst["two"].ID)
 }