diff --git a/src/demo-app/tsconfig.json b/src/demo-app/tsconfig.json
index 31ceecc975e..7d14befdc59 100644
--- a/src/demo-app/tsconfig.json
+++ b/src/demo-app/tsconfig.json
@@ -4,7 +4,6 @@
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
     "lib": ["es6", "es2015", "dom"],
-    "mapRoot": "/",
     "module": "commonjs",
     "moduleResolution": "node",
     "noEmitOnError": true,
diff --git a/src/e2e-app/tsconfig.json b/src/e2e-app/tsconfig.json
index b6ab4c45d6f..bc4ee42255a 100644
--- a/src/e2e-app/tsconfig.json
+++ b/src/e2e-app/tsconfig.json
@@ -4,7 +4,6 @@
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
     "lib": ["es6", "es2015", "dom"],
-    "mapRoot": "",
     "module": "commonjs",
     "moduleResolution": "node",
     "noEmitOnError": true,
diff --git a/src/lib/tsconfig-srcs.json b/src/lib/tsconfig-srcs.json
index 42240acf486..fea7a527507 100644
--- a/src/lib/tsconfig-srcs.json
+++ b/src/lib/tsconfig-srcs.json
@@ -4,7 +4,6 @@
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
     "lib": ["es6", "es2015", "dom"],
-    "mapRoot": "",
     "module": "es2015",
     "moduleResolution": "node",
     "noEmitOnError": true,
diff --git a/src/lib/tsconfig.json b/src/lib/tsconfig.json
index c517a8fb807..5940ef3eeb2 100644
--- a/src/lib/tsconfig.json
+++ b/src/lib/tsconfig.json
@@ -4,7 +4,6 @@
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
     "lib": ["es6", "es2015", "dom"],
-    "mapRoot": "",
     "module": "commonjs",
     "moduleResolution": "node",
     "noEmitOnError": true,