diff --git a/tools/api-checker/config/gwt211_212userapi.conf b/tools/api-checker/config/gwt211_212userapi.conf
index 1279e029d8..ecd503d03d 100644
--- a/tools/api-checker/config/gwt211_212userapi.conf
+++ b/tools/api-checker/config/gwt211_212userapi.conf
@@ -149,4 +149,8 @@ excludedPackages com.google.gwt.core.client.impl\
 ##############################################
 #Api  whitelist
 # when adding to the white-list, include comments as to why the addition is
-# being made.
\ No newline at end of file
+# being made.
+
+# java.io.Reader missing IOException throws for read methods
+java.io.Reader::read([C) OVERRIDABLE_METHOD_EXCEPTION_TYPE_CHANGE new method has more exceptions: [Ljava/io/IOException;]
+java.io.Reader::read([CII) OVERRIDABLE_METHOD_EXCEPTION_TYPE_CHANGE new method has more exceptions: [Ljava/io/IOException;]
diff --git a/user/super/com/google/gwt/emul/java/io/Reader.java b/user/super/com/google/gwt/emul/java/io/Reader.java
index 54137991e6..63216ad3a9 100644
--- a/user/super/com/google/gwt/emul/java/io/Reader.java
+++ b/user/super/com/google/gwt/emul/java/io/Reader.java
@@ -59,7 +59,7 @@ public int read() throws IOException {
   /**
    * Attempts to fill {@code buf} with characters up to the size of the array.
    */
-  public int read(char[] buf) {
+  public int read(char[] buf) throws IOException {
     return read(buf, 0, buf.length);
   }
 
@@ -67,7 +67,7 @@ public int read(char[] buf) {
    * Attempts to fill {@code buf} with up to {@code len} characters. Characters
    * will be stored in {@code buf} starting at index {@code off}.
    */
-  public abstract int read(char[] buf, int off, int len);
+  public abstract int read(char[] buf, int off, int len) throws IOException;
 
   /**
    * Returns whether the stream is ready for reading characters.