diff --git a/classpath/java/io/FileInputStream.java b/classpath/java/io/FileInputStream.java
index 1c7a6c9532..4c0d576368 100644
--- a/classpath/java/io/FileInputStream.java
+++ b/classpath/java/io/FileInputStream.java
@@ -55,7 +55,9 @@ public class FileInputStream extends InputStream {
   }
 
   public void close() throws IOException {
-    close(fd);
-    fd = -1;
+    if (fd != -1) {
+      close(fd);
+      fd = -1;
+    }
   }
 }
diff --git a/classpath/java/io/FileOutputStream.java b/classpath/java/io/FileOutputStream.java
index 4d50412414..d61d44e136 100644
--- a/classpath/java/io/FileOutputStream.java
+++ b/classpath/java/io/FileOutputStream.java
@@ -55,7 +55,9 @@ public class FileOutputStream extends OutputStream {
   }
 
   public void close() throws IOException {
-    close(fd);
-    fd = -1;
+    if (fd != -1) {
+      close(fd);
+      fd = -1;
+    }
   }
 }