diff --git a/java/org/gnu/emacs/EmacsNative.java b/java/org/gnu/emacs/EmacsNative.java
index b2764edad10..97415fcb876 100644
--- a/java/org/gnu/emacs/EmacsNative.java
+++ b/java/org/gnu/emacs/EmacsNative.java
@@ -36,12 +36,6 @@ public final class EmacsNative
   private static final String[] libraryDeps;
 
 
-  /* Like `dup' in C.  */
-  public static native int dup (int fd);
-
-  /* Like `close' in C.  */
-  public static native int close (int fd);
-
   /* Obtain the fingerprint of this build of Emacs.  The fingerprint
      can be used to determine the dump file name.  */
   public static native String getFingerprint ();
diff --git a/src/android.c b/src/android.c
index d3b0bc21478..c25ecd88a5a 100644
--- a/src/android.c
+++ b/src/android.c
@@ -1307,22 +1307,6 @@ android_create_lib_link (void)
 #pragma GCC diagnostic ignored "-Wmissing-prototypes"
 #endif
 
-JNIEXPORT jint JNICALL
-NATIVE_NAME (dup) (JNIEnv *env, jobject object, jint fd)
-{
-  JNI_STACK_ALIGNMENT_PROLOGUE;
-
-  return dup (fd);
-}
-
-JNIEXPORT jint JNICALL
-NATIVE_NAME (close) (JNIEnv *env, jobject object, jint fd)
-{
-  JNI_STACK_ALIGNMENT_PROLOGUE;
-
-  return close (fd);
-}
-
 JNIEXPORT jstring JNICALL
 NATIVE_NAME (getFingerprint) (JNIEnv *env, jobject object)
 {