diff --git a/scribejava-core/src/main/java/com/github/scribejava/core/builder/AbstractServiceBuilder.java b/scribejava-core/src/main/java/com/github/scribejava/core/builder/AbstractServiceBuilder.java
index 7c34f0dae..cfe7f7a7a 100644
--- a/scribejava-core/src/main/java/com/github/scribejava/core/builder/AbstractServiceBuilder.java
+++ b/scribejava-core/src/main/java/com/github/scribejava/core/builder/AbstractServiceBuilder.java
@@ -1,5 +1,6 @@
 package com.github.scribejava.core.builder;
 
+import com.github.scribejava.core.builder.api.BaseApi;
 import com.github.scribejava.core.builder.api.DefaultApi10a;
 import com.github.scribejava.core.builder.api.DefaultApi20;
 import com.github.scribejava.core.model.OAuthConfig;
@@ -8,6 +9,7 @@
 import com.github.scribejava.core.model.SignatureType;
 import com.github.scribejava.core.oauth.OAuth10aService;
 import com.github.scribejava.core.oauth.OAuth20Service;
+import com.github.scribejava.core.oauth.OAuthService;
 import com.github.scribejava.core.utils.Preconditions;
 
 abstract class AbstractServiceBuilder<T extends AbstractServiceBuilder<T>> {
@@ -176,22 +178,12 @@ public String getResponseType() {
     protected abstract OAuthConfig createConfig();
 
     /**
-     * Returns the fully configured {@link OAuth10aService}
+     * Returns the fully configured {@link S}
      *
      * @param api will build Service for this API
-     * @return fully configured {@link OAuth10aService}
+     * @return fully configured {@link S}
      */
-    public OAuth10aService build(DefaultApi10a api) {
-        return api.createService(createConfig());
-    }
-
-    /**
-     * Returns the fully configured {@link OAuth20Service}
-     *
-     * @param api will build Service for this API
-     * @return fully configured {@link OAuth20Service}
-     */
-    public OAuth20Service build(DefaultApi20 api) {
+    public <S extends OAuthService> S build(BaseApi<S> api) {
         return api.createService(createConfig());
     }
 }
diff --git a/scribejava-core/src/main/java/com/github/scribejava/core/builder/api/BaseApi.java b/scribejava-core/src/main/java/com/github/scribejava/core/builder/api/BaseApi.java
new file mode 100644
index 000000000..742a92b09
--- /dev/null
+++ b/scribejava-core/src/main/java/com/github/scribejava/core/builder/api/BaseApi.java
@@ -0,0 +1,9 @@
+package com.github.scribejava.core.builder.api;
+
+import com.github.scribejava.core.model.OAuthConfig;
+import com.github.scribejava.core.oauth.OAuthService;
+
+
+public interface BaseApi<T extends OAuthService> {
+	T createService(OAuthConfig config);
+}
diff --git a/scribejava-core/src/main/java/com/github/scribejava/core/builder/api/DefaultApi10a.java b/scribejava-core/src/main/java/com/github/scribejava/core/builder/api/DefaultApi10a.java
index f0920e103..3b4b148c6 100644
--- a/scribejava-core/src/main/java/com/github/scribejava/core/builder/api/DefaultApi10a.java
+++ b/scribejava-core/src/main/java/com/github/scribejava/core/builder/api/DefaultApi10a.java
@@ -30,7 +30,7 @@
  * fine-tune the process. Please read the javadocs of the interfaces to get an idea of what to do.
  *
  */
-public abstract class DefaultApi10a {
+public abstract class DefaultApi10a implements BaseApi<OAuth10aService> {
 
     /**
      * Returns the access token extractor.
@@ -126,6 +126,7 @@ public Verb getRequestTokenVerb() {
      */
     public abstract String getAuthorizationUrl(OAuth1RequestToken requestToken);
 
+    @Override
     public OAuth10aService createService(OAuthConfig config) {
         return new OAuth10aService(this, config);
     }
diff --git a/scribejava-core/src/main/java/com/github/scribejava/core/builder/api/DefaultApi20.java b/scribejava-core/src/main/java/com/github/scribejava/core/builder/api/DefaultApi20.java
index 4e27aebb0..30095f134 100644
--- a/scribejava-core/src/main/java/com/github/scribejava/core/builder/api/DefaultApi20.java
+++ b/scribejava-core/src/main/java/com/github/scribejava/core/builder/api/DefaultApi20.java
@@ -22,7 +22,7 @@
  * fine-tune the process. Please read the javadocs of the interfaces to get an idea of what to do.
  *
  */
-public abstract class DefaultApi20 {
+public abstract class DefaultApi20 implements BaseApi<OAuth20Service> {
 
     /**
      * Returns the access token extractor.
@@ -88,6 +88,7 @@ public String getAuthorizationUrl(OAuthConfig config, Map<String, String> additi
         return authUrl;
     }
 
+    @Override
     public OAuth20Service createService(OAuthConfig config) {
         return new OAuth20Service(this, config);
     }