diff --git a/src/main/java/com/fasterxml/jackson/core/JsonParser.java b/src/main/java/com/fasterxml/jackson/core/JsonParser.java
index d45a597..e48fce4 100644
--- a/src/main/java/com/fasterxml/jackson/core/JsonParser.java
+++ b/src/main/java/com/fasterxml/jackson/core/JsonParser.java
@@ -1057,7 +1057,7 @@
      *
      * @since 2.9
      */
-    public boolean isNaN() {
+    public boolean isNaN() throws IOException {
         return false;
     }
 
diff --git a/src/main/java/com/fasterxml/jackson/core/util/JsonParserDelegate.java b/src/main/java/com/fasterxml/jackson/core/util/JsonParserDelegate.java
index 54223c8..fa0adcd 100644
--- a/src/main/java/com/fasterxml/jackson/core/util/JsonParserDelegate.java
+++ b/src/main/java/com/fasterxml/jackson/core/util/JsonParserDelegate.java
@@ -122,7 +122,7 @@
     @Override public JsonStreamContext getParsingContext() { return delegate.getParsingContext(); }
     @Override public boolean isExpectedStartArrayToken() { return delegate.isExpectedStartArrayToken(); }
     @Override public boolean isExpectedStartObjectToken() { return delegate.isExpectedStartObjectToken(); }
-    @Override public boolean isNaN() { return delegate.isNaN(); }
+    @Override public boolean isNaN() throws IOException { return delegate.isNaN(); }
 
     /*
     /**********************************************************