diff --git a/src/processor/basic_source_line_resolver.cc b/src/processor/basic_source_line_resolver.cc
--- a/src/processor/basic_source_line_resolver.cc
+++ b/src/processor/basic_source_line_resolver.cc
@@ -109,0 +110,5 @@
+BasicSourceLineResolver::Module* BasicModuleFactory::CreateModule(
+    const string& name) const {
+  return new BasicSourceLineResolver::Module(name);
+}
+
diff --git a/src/processor/fast_source_line_resolver.cc b/src/processor/fast_source_line_resolver.cc
--- a/src/processor/fast_source_line_resolver.cc
+++ b/src/processor/fast_source_line_resolver.cc
@@ -62,0 +63,5 @@
+FastSourceLineResolver::Module* FastModuleFactory::CreateModule(
+    const string& name) const {
+  return new FastSourceLineResolver::Module(name);
+}
+
diff --git a/src/processor/module_factory.h b/src/processor/module_factory.h
--- a/src/processor/module_factory.h
+++ b/src/processor/module_factory.h
@@ -54,4 +54,2 @@
   virtual BasicSourceLineResolver::Module* CreateModule(
-      const string& name) const {
-    return new BasicSourceLineResolver::Module(name);
-  }
+      const string& name) const;
@@ -63,4 +61,2 @@
   virtual FastSourceLineResolver::Module* CreateModule(
-      const string& name) const {
-    return new FastSourceLineResolver::Module(name);
-  }
+      const string& name) const;