diff --git a/source/poodinis/dependency.d b/source/poodinis/dependency.d
index c7568bd..6601de0 100644
--- a/source/poodinis/dependency.d
+++ b/source/poodinis/dependency.d
@@ -37,9 +37,9 @@ class DependencyContainer {
 
 	private static DependencyContainer instance;
 	
-	private Registration[TypeInfo] registrations;
+	private Registration[][TypeInfo] registrations;
 	
-	private Registration*[] autowireStack;
+	private Registration[] autowireStack;
 	
 	public Registration register(ConcreteType)() {
 		return register!(ConcreteType, ConcreteType)();
@@ -55,7 +55,7 @@ class DependencyContainer {
 		
 		Registration newRegistration = new Registration(registeredType, concreteType);
 		newRegistration.singleInstance();
-		registrations[registeredType] = newRegistration;
+		registrations[registeredType] ~= newRegistration;
 		return newRegistration;
 	}
 	
@@ -65,11 +65,13 @@ class DependencyContainer {
 			writeln("DEBUG: Resolving type " ~ resolveType.toString());
 		}
 		
-		Registration* registration = resolveType in registrations;
-		if (!registration) {
+		auto candidates = resolveType in registrations;
+		if (!candidates) {
 			throw new ResolveException("Type not registered.", resolveType);
 		}
 		
+		auto registration = (*candidates)[0];
+		
 		RegistrationType instance = cast(RegistrationType) registration.getInstance();
 		
 		if (!autowireStack.canFind(registration)) {
diff --git a/test/poodinis/dependencytest.d b/test/poodinis/dependencytest.d
index c253532..dd3bd6f 100644
--- a/test/poodinis/dependencytest.d
+++ b/test/poodinis/dependencytest.d
@@ -81,6 +81,15 @@ version(unittest) {
 		public Banana banana;
 	}
 	
+	interface Color {
+	}
+	
+	class Blue : Color {
+	}
+	
+	class Red : Color {
+	}
+	
 	// Test register concrete type
 	unittest {
 		auto container = new DependencyContainer();
@@ -257,4 +266,19 @@ version(unittest) {
 		}
 		assert(false);
 	}
+	
+	// Test register multiple concrete classess to same interface type
+	unittest {
+		auto container = new DependencyContainer();
+		container.register!(Color, Blue);
+		container.register!(Color, Red);
+	}
+	
+	// Test removing all registrations for type with multiple registrations.
+	unittest {
+		auto container = new DependencyContainer();
+		container.register!(Color, Blue);
+		container.register!(Color, Red);
+		container.removeRegistration!Color;
+	}
 }
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