diff --git a/lib.zig b/lib.zig
index 3de1e8c..4e853aa 100644
--- a/lib.zig
+++ b/lib.zig
@@ -29,7 +29,7 @@ pub fn Pkg(pkgdir: comptime []const u8) type {
                     exe.addIncludeDir(pkgdir ++ "/raylib/src/external/glfw/deps/mingw");
                     exe.addCSourceFile(pkgdir ++ "/raylib/src/rglfw.c", raylibFlags);
                 },
-                .macosx => {
+                .macos => {
                     std.debug.warn("Compiling raylib is unsupported on macOS. Please add '-Dsystem-raylib=true' to your build command to use your system raylib.\n", .{});
                     std.os.exit(1);
                 },
diff --git a/lib/generate_functions.py b/lib/generate_functions.py
index d31c9c3..4e965f5 100644
--- a/lib/generate_functions.py
+++ b/lib/generate_functions.py
@@ -13,6 +13,8 @@ def c_to_zig_type(t: str) -> str:
     t = t.replace("const ", "")
     if t == "float":
         t = "f32"
+    if t == "double":
+        t = "f64"
     if t == "int":
         t = "c_int"
     if t == "unsigned int":
diff --git a/lib/raylib-wa.zig b/lib/raylib-wa.zig
index 170f9a4..8dff39b 100644
--- a/lib/raylib-wa.zig
+++ b/lib/raylib-wa.zig
@@ -55,7 +55,7 @@ pub extern fn GetScreenToWorld2D(position: Vector2, camera: Camera2D) Vector2;
 pub extern fn SetTargetFPS(fps: c_int) void;
 pub extern fn GetFPS() c_int;
 pub extern fn GetFrameTime() f32;
-pub extern fn GetTime() double;
+pub extern fn GetTime() f64;
 pub extern fn ColorToInt(color: Color) c_int;
 pub extern fn ColorNormalize(color: Color) Vector4;
 pub extern fn ColorFromNormalized(normalized: Vector4) Color;
diff --git a/lib/raylib-zig-math.zig b/lib/raylib-zig-math.zig
index c47b0ea..2d3f18e 100755
--- a/lib/raylib-zig-math.zig
+++ b/lib/raylib-zig-math.zig
@@ -58,9 +58,9 @@ pub extern fn MatrixRotateY(angle: f32) Matrix;
 pub extern fn MatrixRotateZ(angle: f32) Matrix;
 pub extern fn MatrixScale(x: f32, y: f32, z: f32) Matrix;
 pub extern fn MatrixMultiply(left: Matrix, right: Matrix) Matrix;
-pub extern fn MatrixFrustum(left: double, right: double, bottom: double, top: double, near: double, far: double) Matrix;
-pub extern fn MatrixPerspective(fovy: double, aspect: double, near: double, far: double) Matrix;
-pub extern fn MatrixOrtho(left: double, right: double, bottom: double, top: double, near: double, far: double) Matrix;
+pub extern fn MatrixFrustum(left: f64, right: f64, bottom: f64, top: f64, near: f64, far: f64) Matrix;
+pub extern fn MatrixPerspective(fovy: f64, aspect: f64, near: f64, far: f64) Matrix;
+pub extern fn MatrixOrtho(left: f64, right: f64, bottom: f64, top: f64, near: f64, far: f64) Matrix;
 pub extern fn MatrixLookAt(eye: Vector3, target: Vector3, up: Vector3) Matrix;
 pub extern fn MatrixToFloatV(mat: Matrix) float16;
 pub extern fn QuaternionIdentity() Quaternion;