diff --git a/package.json b/package.json
index 4bf8e1288..f12c9979a 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
     "sinon": "1.17.4",
     "temp": "^0.8.3",
     "text-buffer": "13.14.3",
-    "tree-sitter": "0.12.14",
+    "tree-sitter": "0.12.15",
     "typescript-simple": "1.0.0",
     "underscore-plus": "^1.6.8",
     "winreg": "^1.2.1",
diff --git a/spec/tree-sitter-language-mode-spec.js b/spec/tree-sitter-language-mode-spec.js
index aa82810c4..e59460417 100644
--- a/spec/tree-sitter-language-mode-spec.js
+++ b/spec/tree-sitter-language-mode-spec.js
@@ -307,12 +307,14 @@ describe('TreeSitterLanguageMode', () => {
           },
           injectionPoints: [{
             type: 'call_expression',
-            language: (node, getText) => {
+            language (node) {
               if (node.lastChild.type === 'template_string' && node.firstChild.type === 'identifier') {
-                return getText(node.firstChild)
+                return node.firstChild.text
               }
             },
-            content: node => node.lastChild
+            content (node) {
+              return node.lastChild
+            }
           }]
         })
 
diff --git a/src/tree-sitter-language-mode.js b/src/tree-sitter-language-mode.js
index 9e875de18..cd4cb82f8 100644
--- a/src/tree-sitter-language-mode.js
+++ b/src/tree-sitter-language-mode.js
@@ -10,7 +10,18 @@ let nextId = 0
 const MAX_RANGE = new Range(Point.ZERO, Point.INFINITY).freeze()
 
 class TreeSitterLanguageMode {
+  static _patchSyntaxNode() {
+    if (!Parser.SyntaxNode.prototype.hasOwnProperty('text')) {
+      Object.defineProperty(Parser.SyntaxNode.prototype, 'text', {
+        get () {
+          return this.tree.buffer.getTextInRange(new Range(this.startPosition, this.endPosition))
+        }
+      })
+    }
+  }
+
   constructor ({buffer, grammar, config, grammars}) {
+    TreeSitterLanguageMode._patchSyntaxNode()
     this.id = nextId++
     this.buffer = buffer
     this.grammar = grammar
@@ -25,7 +36,6 @@ class TreeSitterLanguageMode {
     this.isFoldableCache = []
     this.hasQueuedParse = false
 
-    this.getNodeText = this.getNodeText.bind(this)
     this.grammarForLanguageString = this.grammarForLanguageString.bind(this)
     this.emitRangeUpdate = this.emitRangeUpdate.bind(this)
 
@@ -314,10 +324,6 @@ class TreeSitterLanguageMode {
     return this.getRangeForSyntaxNodeContainingRange(new Range(position, position))
   }
 
-  getNodeText (node) {
-    return this.buffer.getTextInRange(new Range(node.startPosition, node.endPosition))
-  }
-
   /*
   Section - Backward compatibility shims
   */
@@ -456,7 +462,6 @@ class LanguageLayer {
       injectionsMarkerLayer,
       grammarForLanguageString,
       emitRangeUpdate,
-      getNodeText
     } = this.languageMode
 
     let includedRanges
@@ -470,6 +475,7 @@ class LanguageLayer {
       syncOperationLimit: 1000,
       includedRanges
     })
+    tree.buffer = this.languageMode.buffer
 
     let affectedRange
     let existingInjectionMarkers
@@ -509,7 +515,7 @@ class LanguageLayer {
       )
 
       for (const node of nodes) {
-        const languageName = injectionPoint.language(node, getNodeText)
+        const languageName = injectionPoint.language(node)
         if (!languageName) continue
 
         const grammar = grammarForLanguageString(languageName)