diff --git a/src/services/formatting/rules.ts b/src/services/formatting/rules.ts
index b2dac950323..8d710f87a4e 100644
--- a/src/services/formatting/rules.ts
+++ b/src/services/formatting/rules.ts
@@ -442,7 +442,7 @@ namespace ts.formatting {
             case SyntaxKind.ForInStatement:
             // "in" keyword in [P in keyof T]: T[P]
             case SyntaxKind.TypeParameter:
-                return context.currentTokenSpan.kind === SyntaxKind.InKeyword || context.nextTokenSpan.kind === SyntaxKind.InKeyword;
+                return context.currentTokenSpan.kind === SyntaxKind.InKeyword || context.nextTokenSpan.kind === SyntaxKind.InKeyword || context.currentTokenSpan.kind === SyntaxKind.EqualsToken || context.nextTokenSpan.kind === SyntaxKind.EqualsToken;
             // Technically, "of" is not a binary operator, but format it the same way as "in"
             case SyntaxKind.ForOfStatement:
                 return context.currentTokenSpan.kind === SyntaxKind.OfKeyword || context.nextTokenSpan.kind === SyntaxKind.OfKeyword;
diff --git a/tests/cases/fourslash/formatTypeParameters.ts b/tests/cases/fourslash/formatTypeParameters.ts
new file mode 100644
index 00000000000..a6823a4d0bf
--- /dev/null
+++ b/tests/cases/fourslash/formatTypeParameters.ts
@@ -0,0 +1,8 @@
+/// <reference path="fourslash.ts"/>
+
+/////**/type Bar<T extends any[]= any[]> = T
+
+
+format.document();
+goTo.marker();
+verify.currentLineContentIs('type Bar<T extends any[] = any[]> = T');
\ No newline at end of file