diff --git a/src/google/protobuf/compiler/ruby/ruby_generated_code_pb.rb b/src/google/protobuf/compiler/ruby/ruby_generated_code_pb.rb
index 0c9ed6fb9f..7e66d1ecc8 100644
--- a/src/google/protobuf/compiler/ruby/ruby_generated_code_pb.rb
+++ b/src/google/protobuf/compiler/ruby/ruby_generated_code_pb.rb
@@ -68,9 +68,9 @@ end
 module A
   module B
     module C
-      TestMessage = Google::Protobuf::DescriptorPool.generated_pool.lookup("A.B.C.TestMessage").msgclass
-      TestMessage::NestedMessage = Google::Protobuf::DescriptorPool.generated_pool.lookup("A.B.C.TestMessage.NestedMessage").msgclass
-      TestEnum = Google::Protobuf::DescriptorPool.generated_pool.lookup("A.B.C.TestEnum").enummodule
+      TestMessage = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("A.B.C.TestMessage").msgclass
+      TestMessage::NestedMessage = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("A.B.C.TestMessage.NestedMessage").msgclass
+      TestEnum = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("A.B.C.TestEnum").enummodule
     end
   end
 end
diff --git a/src/google/protobuf/compiler/ruby/ruby_generated_code_proto2_pb.rb b/src/google/protobuf/compiler/ruby/ruby_generated_code_proto2_pb.rb
index 15b340ada0..c89738fe83 100644
--- a/src/google/protobuf/compiler/ruby/ruby_generated_code_proto2_pb.rb
+++ b/src/google/protobuf/compiler/ruby/ruby_generated_code_proto2_pb.rb
@@ -69,9 +69,9 @@ end
 module A
   module B
     module C
-      TestMessage = Google::Protobuf::DescriptorPool.generated_pool.lookup("A.B.C.TestMessage").msgclass
-      TestMessage::NestedMessage = Google::Protobuf::DescriptorPool.generated_pool.lookup("A.B.C.TestMessage.NestedMessage").msgclass
-      TestEnum = Google::Protobuf::DescriptorPool.generated_pool.lookup("A.B.C.TestEnum").enummodule
+      TestMessage = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("A.B.C.TestMessage").msgclass
+      TestMessage::NestedMessage = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("A.B.C.TestMessage.NestedMessage").msgclass
+      TestEnum = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("A.B.C.TestEnum").enummodule
     end
   end
 end
diff --git a/src/google/protobuf/compiler/ruby/ruby_generated_pkg_explicit_legacy_pb.rb b/src/google/protobuf/compiler/ruby/ruby_generated_pkg_explicit_legacy_pb.rb
index 74f3bf3d76..cdbbe891bc 100644
--- a/src/google/protobuf/compiler/ruby/ruby_generated_pkg_explicit_legacy_pb.rb
+++ b/src/google/protobuf/compiler/ruby/ruby_generated_pkg_explicit_legacy_pb.rb
@@ -14,7 +14,7 @@ end
 module AA
   module BB
     module CC
-      Four = Google::Protobuf::DescriptorPool.generated_pool.lookup("one.two.a_three.and.Four").msgclass
+      Four = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("one.two.a_three.and.Four").msgclass
     end
   end
 end
diff --git a/src/google/protobuf/compiler/ruby/ruby_generated_pkg_explicit_pb.rb b/src/google/protobuf/compiler/ruby/ruby_generated_pkg_explicit_pb.rb
index 24ff21e174..e6d47011e8 100644
--- a/src/google/protobuf/compiler/ruby/ruby_generated_pkg_explicit_pb.rb
+++ b/src/google/protobuf/compiler/ruby/ruby_generated_pkg_explicit_pb.rb
@@ -14,7 +14,7 @@ end
 module A
   module B
     module C
-      Four = Google::Protobuf::DescriptorPool.generated_pool.lookup("one.two.a_three.Four").msgclass
+      Four = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("one.two.a_three.Four").msgclass
     end
   end
 end
diff --git a/src/google/protobuf/compiler/ruby/ruby_generated_pkg_implicit_pb.rb b/src/google/protobuf/compiler/ruby/ruby_generated_pkg_implicit_pb.rb
index 3a1dd67d26..1ac0ef7ad0 100644
--- a/src/google/protobuf/compiler/ruby/ruby_generated_pkg_implicit_pb.rb
+++ b/src/google/protobuf/compiler/ruby/ruby_generated_pkg_implicit_pb.rb
@@ -14,7 +14,7 @@ end
 module One
   module Two
     module AThree
-      Four = Google::Protobuf::DescriptorPool.generated_pool.lookup("one.two.a_three.Four").msgclass
+      Four = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("one.two.a_three.Four").msgclass
     end
   end
 end
diff --git a/src/google/protobuf/compiler/ruby/ruby_generator.cc b/src/google/protobuf/compiler/ruby/ruby_generator.cc
index 23091c8f4f..67b5538cd7 100644
--- a/src/google/protobuf/compiler/ruby/ruby_generator.cc
+++ b/src/google/protobuf/compiler/ruby/ruby_generator.cc
@@ -371,7 +371,7 @@ void GenerateMessageAssignment(const std::string& prefix,
     "prefix", prefix,
     "name", RubifyConstant(message->name()));
   printer->Print(
-    "Google::Protobuf::DescriptorPool.generated_pool."
+    "::Google::Protobuf::DescriptorPool.generated_pool."
     "lookup(\"$full_name$\").msgclass\n",
     "full_name", message->full_name());
 
@@ -391,7 +391,7 @@ void GenerateEnumAssignment(const std::string& prefix, const EnumDescriptor* en,
     "prefix", prefix,
     "name", RubifyConstant(en->name()));
   printer->Print(
-    "Google::Protobuf::DescriptorPool.generated_pool."
+    "::Google::Protobuf::DescriptorPool.generated_pool."
     "lookup(\"$full_name$\").enummodule\n",
     "full_name", en->full_name());
 }