diff --git a/src/services/codefixes/helpers.ts b/src/services/codefixes/helpers.ts
index eec693bbb69..461771c0b5e 100644
--- a/src/services/codefixes/helpers.ts
+++ b/src/services/codefixes/helpers.ts
@@ -97,7 +97,7 @@ namespace ts.codefix {
         optional: boolean,
         body: Block | undefined,
     ): MethodDeclaration | undefined {
-        const signatureDeclaration = <MethodDeclaration>checker.signatureToSignatureDeclaration(signature, SyntaxKind.MethodDeclaration, enclosingDeclaration, NodeBuilderFlags.SuppressAnyReturnType);
+        const signatureDeclaration = <MethodDeclaration>checker.signatureToSignatureDeclaration(signature, SyntaxKind.MethodDeclaration, enclosingDeclaration, NodeBuilderFlags.NoTruncation | NodeBuilderFlags.SuppressAnyReturnType);
         if (!signatureDeclaration) {
             return undefined;
         }
diff --git a/tests/cases/fourslash/codeFixClassExtendAbstractMethodWithLongName.ts b/tests/cases/fourslash/codeFixClassExtendAbstractMethodWithLongName.ts
new file mode 100644
index 00000000000..dd2eb9c1709
--- /dev/null
+++ b/tests/cases/fourslash/codeFixClassExtendAbstractMethodWithLongName.ts
@@ -0,0 +1,50 @@
+/// <reference path='fourslash.ts' />
+
+////namespace some.really.long.generated.type.goes.here.you.know.this_.should.be.pretty.simple {
+////  export interface Yah {}
+////}
+////namespace another.really.long.generated.type.goes.here.too.because.who.cares.about.space.do_.you.feel.me {
+////  export interface Yah {}
+////}
+////interface this_will_be_collapsed {}
+////interface this_is_fine {}
+////abstract class AbstractCstVisitor {
+////  abstract Node(
+////    arg1: [
+////      some.really.long.generated.type.goes.here.you.know.this_.should.be.pretty.simple.Yah[],
+////      another.really.long.generated.type.goes.here.too.because.who.cares.about.space.do_.you.feel.me.Yah[]
+////    ],
+////    arg2: [this_will_be_collapsed],
+////    arg3: Set<this_will_be_collapsed>,
+////    arg4: this_is_fine
+////  ): Set<this_will_be_collapsed>;
+////}
+////class CstVisitorImplementation extends AbstractCstVisitor {}
+
+verify.codeFix({
+  description: "Implement inherited abstract class",
+  newFileContent: `namespace some.really.long.generated.type.goes.here.you.know.this_.should.be.pretty.simple {
+  export interface Yah {}
+}
+namespace another.really.long.generated.type.goes.here.too.because.who.cares.about.space.do_.you.feel.me {
+  export interface Yah {}
+}
+interface this_will_be_collapsed {}
+interface this_is_fine {}
+abstract class AbstractCstVisitor {
+  abstract Node(
+    arg1: [
+      some.really.long.generated.type.goes.here.you.know.this_.should.be.pretty.simple.Yah[],
+      another.really.long.generated.type.goes.here.too.because.who.cares.about.space.do_.you.feel.me.Yah[]
+    ],
+    arg2: [this_will_be_collapsed],
+    arg3: Set<this_will_be_collapsed>,
+    arg4: this_is_fine
+  ): Set<this_will_be_collapsed>;
+}
+class CstVisitorImplementation extends AbstractCstVisitor {
+    Node(arg1: [some.really.long.generated.type.goes.here.you.know.this_.should.be.pretty.simple.Yah[], another.really.long.generated.type.goes.here.too.because.who.cares.about.space.do_.you.feel.me.Yah[]], arg2: [this_will_be_collapsed], arg3: any, arg4: this_is_fine) {
+        throw new Error("Method not implemented.");
+    }
+}`
+});