diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index d6ed0b10648..e6a53885000 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -407,7 +407,7 @@ namespace ts {
             const lineEnd = i < lastLineInFile ? getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
             let lineContent = file.text.slice(lineStart, lineEnd);
             lineContent = lineContent.replace(/\s+$/g, "");  // trim from end
-            lineContent = lineContent.replace("\t", " ");    // convert tabs to single spaces
+            lineContent = lineContent.replace(/\t/g, " ");   // convert tabs to single spaces
 
             // Output the gutter and the actual contents of the line.
             context += indent + formatColorAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
diff --git a/tests/baselines/reference/prettyFileWithErrorsAndTabs.errors.txt b/tests/baselines/reference/prettyFileWithErrorsAndTabs.errors.txt
new file mode 100644
index 00000000000..e0727c9429b
--- /dev/null
+++ b/tests/baselines/reference/prettyFileWithErrorsAndTabs.errors.txt
@@ -0,0 +1,30 @@
+tests/cases/compiler/prettyFileWithErrorsAndTabs.ts:3:9 - error TS2322: Type 'number' is not assignable to type 'string'.
+
+3   const x: string = 12;
+          ~
+tests/cases/compiler/prettyFileWithErrorsAndTabs.ts:4:9 - error TS2322: Type 'number' is not assignable to type 'string'.
+
+4   const y: string = 12;
+          ~
+tests/cases/compiler/prettyFileWithErrorsAndTabs.ts:5:9 - error TS2322: Type 'number' is not assignable to type 'string'.
+
+5   const z: string = 12;
+          ~
+
+
+==== tests/cases/compiler/prettyFileWithErrorsAndTabs.ts (3 errors) ====
+    function f() {
+    	{
+    		const x: string = 12;
+    		      ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+    		const y: string = 12;
+    		      ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+    		const z: string = 12;
+    		      ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+    	}
+    }
+Found 3 errors.
+
diff --git a/tests/baselines/reference/prettyFileWithErrorsAndTabs.js b/tests/baselines/reference/prettyFileWithErrorsAndTabs.js
new file mode 100644
index 00000000000..ca6d2424f56
--- /dev/null
+++ b/tests/baselines/reference/prettyFileWithErrorsAndTabs.js
@@ -0,0 +1,17 @@
+//// [prettyFileWithErrorsAndTabs.ts]
+function f() {
+	{
+		const x: string = 12;
+		const y: string = 12;
+		const z: string = 12;
+	}
+}
+
+//// [prettyFileWithErrorsAndTabs.js]
+function f() {
+    {
+        var x = 12;
+        var y = 12;
+        var z = 12;
+    }
+}
diff --git a/tests/baselines/reference/prettyFileWithErrorsAndTabs.symbols b/tests/baselines/reference/prettyFileWithErrorsAndTabs.symbols
new file mode 100644
index 00000000000..a009e897037
--- /dev/null
+++ b/tests/baselines/reference/prettyFileWithErrorsAndTabs.symbols
@@ -0,0 +1,14 @@
+=== tests/cases/compiler/prettyFileWithErrorsAndTabs.ts ===
+function f() {
+>f : Symbol(f, Decl(prettyFileWithErrorsAndTabs.ts, 0, 0))
+	{
+		const x: string = 12;
+>x : Symbol(x, Decl(prettyFileWithErrorsAndTabs.ts, 2, 7))
+
+		const y: string = 12;
+>y : Symbol(y, Decl(prettyFileWithErrorsAndTabs.ts, 3, 7))
+
+		const z: string = 12;
+>z : Symbol(z, Decl(prettyFileWithErrorsAndTabs.ts, 4, 7))
+	}
+}
diff --git a/tests/baselines/reference/prettyFileWithErrorsAndTabs.types b/tests/baselines/reference/prettyFileWithErrorsAndTabs.types
new file mode 100644
index 00000000000..660ce754170
--- /dev/null
+++ b/tests/baselines/reference/prettyFileWithErrorsAndTabs.types
@@ -0,0 +1,17 @@
+=== tests/cases/compiler/prettyFileWithErrorsAndTabs.ts ===
+function f() {
+>f : () => void
+	{
+		const x: string = 12;
+>x : string
+>12 : 12
+
+		const y: string = 12;
+>y : string
+>12 : 12
+
+		const z: string = 12;
+>z : string
+>12 : 12
+	}
+}
diff --git a/tests/cases/compiler/prettyFileWithErrorsAndTabs.ts b/tests/cases/compiler/prettyFileWithErrorsAndTabs.ts
new file mode 100644
index 00000000000..e2aacbf0af6
--- /dev/null
+++ b/tests/cases/compiler/prettyFileWithErrorsAndTabs.ts
@@ -0,0 +1,8 @@
+// @pretty: true
+function f() {
+	{
+		const x: string = 12;
+		const y: string = 12;
+		const z: string = 12;
+	}
+}
\ No newline at end of file