diff --git a/cscore/src/main/native/include/cscore_cv.h b/cscore/src/main/native/include/cscore_cv.h
index 6911ae2fa1..30a356bef3 100644
--- a/cscore/src/main/native/include/cscore_cv.h
+++ b/cscore/src/main/native/include/cscore_cv.h
@@ -152,7 +152,8 @@ class CvSink : public ImageSink {
    *         message); the frame time is in the same time base as wpi::Now(),
    *         and is in 1 us increments.
    */
-  uint64_t GrabFrame(cv::Mat& image, double timeout = 0.225) const;
+  [[nodiscard]] uint64_t GrabFrame(cv::Mat& image,
+                                   double timeout = 0.225) const;
 
   /**
    * Wait for the next frame and get the image.  May block forever.
@@ -162,7 +163,7 @@ class CvSink : public ImageSink {
    *         message); the frame time is in the same time base as wpi::Now(),
    *         and is in 1 us increments.
    */
-  uint64_t GrabFrameNoTimeout(cv::Mat& image) const;
+  [[nodiscard]] uint64_t GrabFrameNoTimeout(cv::Mat& image) const;
 };
 
 inline CvSource::CvSource(std::string_view name, const VideoMode& mode) {
diff --git a/cscore/src/main/native/include/cscore_raw.h b/cscore/src/main/native/include/cscore_raw.h
index adb9649727..0aaaeffd12 100644
--- a/cscore/src/main/native/include/cscore_raw.h
+++ b/cscore/src/main/native/include/cscore_raw.h
@@ -174,7 +174,8 @@ class RawSink : public ImageSink {
    *         message); the frame time is in the same time base as wpi::Now(),
    *         and is in 1 us increments.
    */
-  uint64_t GrabFrame(RawFrame& image, double timeout = 0.225) const;
+  [[nodiscard]] uint64_t GrabFrame(RawFrame& image,
+                                   double timeout = 0.225) const;
 
   /**
    * Wait for the next frame and get the image.  May block forever.
@@ -184,7 +185,7 @@ class RawSink : public ImageSink {
    *         message); the frame time is in the same time base as wpi::Now(),
    *         and is in 1 us increments.
    */
-  uint64_t GrabFrameNoTimeout(RawFrame& image) const;
+  [[nodiscard]] uint64_t GrabFrameNoTimeout(RawFrame& image) const;
 };
 
 inline RawSource::RawSource(std::string_view name, const VideoMode& mode) {
diff --git a/cscore/src/main/native/include/cscore_raw_cv.h b/cscore/src/main/native/include/cscore_raw_cv.h
index 88c94a1642..5b9a37439f 100644
--- a/cscore/src/main/native/include/cscore_raw_cv.h
+++ b/cscore/src/main/native/include/cscore_raw_cv.h
@@ -111,7 +111,7 @@ class RawCvSink : public RawSink {
    *         message); the frame time is in the same time base as wpi::Now(),
    *         and is in 1 us increments.
    */
-  uint64_t GrabFrame(cv::Mat& image, double timeout = 0.225);
+  [[nodiscard]] uint64_t GrabFrame(cv::Mat& image, double timeout = 0.225);
 
   /**
    * Wait for the next frame and get the image.  May block forever.
@@ -121,7 +121,7 @@ class RawCvSink : public RawSink {
    *         message); the frame time is in the same time base as wpi::Now(),
    *         and is in 1 us increments.
    */
-  uint64_t GrabFrameNoTimeout(cv::Mat& image);
+  [[nodiscard]] uint64_t GrabFrameNoTimeout(cv::Mat& image);
 
   /**
    * Wait for the next frame and get the image.
@@ -132,7 +132,8 @@ class RawCvSink : public RawSink {
    *         message); the frame time is in the same time base as wpi::Now(),
    *         and is in 1 us increments.
    */
-  uint64_t GrabFrameDirect(cv::Mat& image, double timeout = 0.225);
+  [[nodiscard]] uint64_t GrabFrameDirect(cv::Mat& image,
+                                         double timeout = 0.225);
 
   /**
    * Wait for the next frame and get the image.  May block forever.
@@ -142,7 +143,7 @@ class RawCvSink : public RawSink {
    *         message); the frame time is in the same time base as wpi::Now(),
    *         and is in 1 us increments.
    */
-  uint64_t GrabFrameNoTimeoutDirect(cv::Mat& image);
+  [[nodiscard]] uint64_t GrabFrameNoTimeoutDirect(cv::Mat& image);
 
  private:
   RawFrame rawFrame;