diff --git a/README.md b/README.md
index 74330aa..ad73a4c 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ github "bscothern/Once"
 ## Swift Package Manager
 Update your `Package.swift` to include this to your package dependencies:
 ```
-.package(url: "https://github.com/bscothern/Once.git", from: "1.2.0")
+.package(url: "https://github.com/bscothern/Once.git", from: "1.3.0")
 ```
 
 ## Usage
diff --git a/Sources/OnceC/include/OnceC.h b/Sources/OnceC/include/OnceC.h
index 95268ce..9892f8d 100644
--- a/Sources/OnceC/include/OnceC.h
+++ b/Sources/OnceC/include/OnceC.h
@@ -29,6 +29,7 @@
 #ifndef OnceC_h
 #define OnceC_h
 
+#include <sys/types.h>
 #include <pthread.h>
 
 /// The struct that we will use in Swift since we cannot directly access `pthread_once_t`.
diff --git a/Sources/include/Once/module.modulemap b/Sources/include/Once/module.modulemap
deleted file mode 100644
index 7614262..0000000
--- a/Sources/include/Once/module.modulemap
+++ /dev/null
@@ -1,33 +0,0 @@
-//
-//  module.modulemap
-//  Once
-//
-//  Created by Braden Scothern on 10/11/17.
-//  Copyright © 2017 Braden Scothern. All rights reserved.
-//
-// The MIT License (MIT)
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-//
-
-framework module Once {
-    header "Once.h"
-    
-    private header "OnceC.h"
-}