diff --git a/wpiutil/src/main/java/edu/wpi/first/util/WPIUtilJNI.java b/wpiutil/src/main/java/edu/wpi/first/util/WPIUtilJNI.java
index d2a76fe4da..92e4f17d90 100644
--- a/wpiutil/src/main/java/edu/wpi/first/util/WPIUtilJNI.java
+++ b/wpiutil/src/main/java/edu/wpi/first/util/WPIUtilJNI.java
@@ -54,6 +54,8 @@ public class WPIUtilJNI {
     libraryLoaded = true;
   }
 
+  public static native void writeStderr(String str);
+
   public static native void enableMockTime();
 
   public static native void disableMockTime();
diff --git a/wpiutil/src/main/native/cpp/jni/WPIUtilJNI.cpp b/wpiutil/src/main/native/cpp/jni/WPIUtilJNI.cpp
index 34ca873ed1..15b1895718 100644
--- a/wpiutil/src/main/native/cpp/jni/WPIUtilJNI.cpp
+++ b/wpiutil/src/main/native/cpp/jni/WPIUtilJNI.cpp
@@ -5,6 +5,7 @@
 #include <jni.h>
 
 #include "edu_wpi_first_util_WPIUtilJNI.h"
+#include "fmt/format.h"
 #include "wpi/Synchronization.h"
 #include "wpi/jni_util.h"
 #include "wpi/timestamp.h"
@@ -41,6 +42,18 @@ JNIEXPORT void JNICALL JNI_OnUnload(JavaVM* vm, void* reserved) {
   interruptedEx.free(env);
 }
 
+/*
+ * Class:     edu_wpi_first_util_WPIUtilJNI
+ * Method:    writeStderr
+ * Signature: (Ljava/lang/String;)V
+ */
+JNIEXPORT void JNICALL
+Java_edu_wpi_first_util_WPIUtilJNI_writeStderr
+  (JNIEnv* env, jclass, jstring str)
+{
+  fmt::print(stderr, "{}", JStringRef{env, str});
+}
+
 /*
  * Class:     edu_wpi_first_util_WPIUtilJNI
  * Method:    enableMockTime