diff --git a/benchmark/injector_benchmark_common.dart b/benchmark/injector_benchmark_common.dart
index ce1cbd9..8fe3840 100644
--- a/benchmark/injector_benchmark_common.dart
+++ b/benchmark/injector_benchmark_common.dart
@@ -23,15 +23,15 @@ class InjectorBenchmark extends BenchmarkBase {
 
   setup() {
     module = new Module()
-      ..type(A)
-      ..type(B)
-      ..type(C)
-      ..type(C, withAnnotation: AnnOne, implementedBy: COne )
-      ..type(D)
-      ..type(E)
-      ..type(E, withAnnotation: AnnTwo, implementedBy: ETwo )
-      ..type(F)
-      ..type(G);
+      ..bind(A)
+      ..bind(B)
+      ..bind(C)
+      ..bind(C, withAnnotation: AnnOne, toImplementation: COne )
+      ..bind(D)
+      ..bind(E)
+      ..bind(E, withAnnotation: AnnTwo, toImplementation: ETwo )
+      ..bind(F)
+      ..bind(G);
   }
 
   teardown() {
diff --git a/benchmark/module_benchmark.dart b/benchmark/module_benchmark.dart
index cb18a5a..a92c6db 100644
--- a/benchmark/module_benchmark.dart
+++ b/benchmark/module_benchmark.dart
@@ -10,11 +10,11 @@ class ModuleBenchmark extends BenchmarkBase {
 
   void run() {
     var m = new Module()
-      ..type(A)
-      ..type(B)
-      ..type(C)
-      ..type(D)
-      ..type(E);
+      ..bind(A)
+      ..bind(B)
+      ..bind(C)
+      ..bind(D)
+      ..bind(E);
   }
 }
 
diff --git a/lib/src/module.dart b/lib/src/module.dart
index 020ea8d..fb94152 100644
--- a/lib/src/module.dart
+++ b/lib/src/module.dart
@@ -95,7 +95,7 @@ class Module {
   void bindByKey(Key key, {dynamic toValue: _DEFAULT_VALUE,
       FactoryFn toFactory: _DEFAULT_VALUE, Type toImplementation,
       Visibility visibility}) {
-    _checkBindArgs(toValue, toFactory, toImplementation);
+    assert(_assertBindArgsValid(toValue, toFactory, toImplementation));
     _dirty();
     if (!identical(toValue, _DEFAULT_VALUE)) {
       _providers[key.id] = new ValueProvider(key.type, toValue, visibility);
@@ -107,7 +107,7 @@ class Module {
     }
   }
 
-  _checkBindArgs(toValue, toFactory, toImplementation) {
+  _assertBindArgsValid(toValue, toFactory, toImplementation) {
     int count = 0;
     if (!identical(toValue, _DEFAULT_VALUE)) count++;
     if (!identical(toFactory, _DEFAULT_VALUE)) count++;