diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 77b3be4..90dca61 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -1,4 +1,4 @@
-name: C/C++ CI
+name: Linux
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
   cancel-in-progress: true
@@ -35,7 +35,7 @@ jobs:
           python3-dev
 
     - name: Meson setup
-      run: meson setup _build -Db_sanitize=address,undefined
+      run: CFLAGS="-Werror" meson setup _build -Db_sanitize=address,undefined
 
     - name: Build
       run: meson compile -C _build
@@ -45,7 +45,8 @@ jobs:
         cd _build
         meson test -v
 
-    - name: Test swig
+    - name: Test swig build
       run:  |
-        meson setup _build --reconfigure -Dswig_lang=python
+        rm -rf _build
+        meson setup _build -Dswig_lang=python
         meson compile -C _build
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
new file mode 100644
index 0000000..e31dc27
--- /dev/null
+++ b/.github/workflows/macos.yml
@@ -0,0 +1,41 @@
+name: MacOS
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
+on:
+  push:
+    branches: [ master ]
+    paths:
+    - '**'
+    - '!**.yml'
+    - '!**.md'
+    - '**/macos.yml'
+
+  pull_request:
+    branches: [ master ]
+    paths:
+    - '**'
+    - '!**.yml'
+    - '!**.md'
+    - '**/macos.yml'
+
+jobs:
+  MacOS:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install Dependencies
+      run: |
+        brew update
+        brew install \
+          meson
+
+    - name: Meson setup
+      run: CFLAGS="-Werror" meson setup _build -Db_sanitize=address,undefined
+
+    - name: Build
+      run: meson compile -C _build
+
+    - name: Test
+      run: meson test -v -C _build
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index d3a9be1..2e3887c 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -37,7 +37,7 @@ jobs:
     - name: Meson setup
       shell: msys2 {0}
       run: |
-        meson setup _build
+        CFLAGS="-Werror" meson setup _build
 
     - name: Build
       shell: msys2 {0}
diff --git a/README.md b/README.md
index 894f17f..34f872f 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 [![Linux](https://github.com/theimpossibleastronaut/deckhandler/actions/workflows/linux.yml/badge.svg)](https://github.com/theimpossibleastronaut/deckhandler/actions/workflows/linux.yml)
 [![Windows](https://github.com/theimpossibleastronaut/deckhandler/actions/workflows/windows.yml/badge.svg)](https://github.com/theimpossibleastronaut/deckhandler/actions/workflows/windows.yml)
+[![MacOS](https://github.com/Dealer-s-Choice/deckhandler/actions/workflows/macos.yml/badge.svg)](https://github.com/Dealer-s-Choice/deckhandler/actions/workflows/macos.yml)
 
 # deckhandler
 Library that will create a deck of cards and shuffle it.
diff --git a/subprojects/pcg/pcg_basic.c b/subprojects/pcg/pcg_basic.c
index 8c2fd0d..1a2972e 100644
--- a/subprojects/pcg/pcg_basic.c
+++ b/subprojects/pcg/pcg_basic.c
@@ -66,7 +66,7 @@ uint32_t pcg32_random_r(pcg32_random_t* rng)
     return (xorshifted >> rot) | (xorshifted << ((-rot) & 31));
 }
 
-uint32_t pcg32_random()
+uint32_t pcg32_random(void)
 {
     return pcg32_random_r(&pcg32_global);
 }
@@ -98,7 +98,7 @@ uint32_t pcg32_boundedrand_r(pcg32_random_t* rng, uint32_t bound)
     // should usually terminate quickly; on average (assuming all bounds are
     // equally likely), 82.25% of the time, we can expect it to require just
     // one iteration.  In the worst case, someone passes a bound of 2^31 + 1
-    // (i.e., 2147483649), which invalidates almost 50% of the range.  In 
+    // (i.e., 2147483649), which invalidates almost 50% of the range.  In
     // practice, bounds are typically small and only a tiny amount of the range
     // is eliminated.
     for (;;) {