diff --git a/Cargo.toml b/Cargo.toml
index e7a45ce0..8709e748 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -67,11 +67,6 @@ core-foundation = "0.9"
 core-graphics = "0.22"
 dispatch = "0.2.0"
 
-[target.'cfg(target_os = "macos")'.dependencies.core-video-sys]
-version = "0.1.4"
-default_features = false
-features = ["display_link"]
-
 [target.'cfg(target_os = "windows")'.dependencies]
 parking_lot = "0.12"
 
diff --git a/src/platform_impl/macos/ffi.rs b/src/platform_impl/macos/ffi.rs
index 229bd659..0a23e60d 100644
--- a/src/platform_impl/macos/ffi.rs
+++ b/src/platform_impl/macos/ffi.rs
@@ -221,3 +221,45 @@ extern "C" {
     pub fn CGDisplayModeRetain(mode: CGDisplayModeRef);
     pub fn CGDisplayModeRelease(mode: CGDisplayModeRef);
 }
+
+mod core_video {
+    use super::*;
+
+    #[link(name = "CoreVideo", kind = "framework")]
+    extern "C" {}
+
+    // CVBase.h
+
+    pub type CVTimeFlags = i32; // int32_t
+    pub const kCVTimeIsIndefinite: CVTimeFlags = 1 << 0;
+
+    #[repr(C)]
+    #[derive(Debug, Clone)]
+    pub struct CVTime {
+        pub time_value: i64, // int64_t
+        pub time_scale: i32, // int32_t
+        pub flags: i32,      // int32_t
+    }
+
+    // CVReturn.h
+
+    pub type CVReturn = i32; // int32_t
+    pub const kCVReturnSuccess: CVReturn = 0;
+
+    // CVDisplayLink.h
+
+    pub type CVDisplayLinkRef = *mut c_void;
+
+    extern "C" {
+        pub fn CVDisplayLinkCreateWithCGDisplay(
+            displayID: CGDirectDisplayID,
+            displayLinkOut: *mut CVDisplayLinkRef,
+        ) -> CVReturn;
+        pub fn CVDisplayLinkGetNominalOutputVideoRefreshPeriod(
+            displayLink: CVDisplayLinkRef,
+        ) -> CVTime;
+        pub fn CVDisplayLinkRelease(displayLink: CVDisplayLinkRef);
+    }
+}
+
+pub use core_video::*;
diff --git a/src/platform_impl/macos/monitor.rs b/src/platform_impl/macos/monitor.rs
index 08dba6c9..d421951e 100644
--- a/src/platform_impl/macos/monitor.rs
+++ b/src/platform_impl/macos/monitor.rs
@@ -16,10 +16,6 @@ use core_foundation::{
     string::CFString,
 };
 use core_graphics::display::{CGDirectDisplayID, CGDisplay, CGDisplayBounds};
-use core_video_sys::{
-    kCVReturnSuccess, kCVTimeIsIndefinite, CVDisplayLinkCreateWithCGDisplay,
-    CVDisplayLinkGetNominalOutputVideoRefreshPeriod, CVDisplayLinkRelease,
-};
 
 #[derive(Clone)]
 pub struct VideoMode {
@@ -228,16 +224,16 @@ impl MonitorHandle {
         let cv_refresh_rate = unsafe {
             let mut display_link = std::ptr::null_mut();
             assert_eq!(
-                CVDisplayLinkCreateWithCGDisplay(self.0, &mut display_link),
-                kCVReturnSuccess
+                ffi::CVDisplayLinkCreateWithCGDisplay(self.0, &mut display_link),
+                ffi::kCVReturnSuccess
             );
-            let time = CVDisplayLinkGetNominalOutputVideoRefreshPeriod(display_link);
-            CVDisplayLinkRelease(display_link);
+            let time = ffi::CVDisplayLinkGetNominalOutputVideoRefreshPeriod(display_link);
+            ffi::CVDisplayLinkRelease(display_link);
 
             // This value is indefinite if an invalid display link was specified
-            assert!(time.flags & kCVTimeIsIndefinite == 0);
+            assert!(time.flags & ffi::kCVTimeIsIndefinite == 0);
 
-            time.timeScale as i64 / time.timeValue
+            time.time_scale as i64 / time.time_value
         };
 
         let monitor = self.clone();