diff --git a/src/runtime/java/org/grammaticalframework/pgf/Expr.java b/src/runtime/java/org/grammaticalframework/pgf/Expr.java
index 08e75ea04..1cc014ca2 100644
--- a/src/runtime/java/org/grammaticalframework/pgf/Expr.java
+++ b/src/runtime/java/org/grammaticalframework/pgf/Expr.java
@@ -100,7 +100,7 @@ public class Expr implements Serializable {
 
 		/** Compares the current expression with another expression by value. 
 		 * @return True if the expressions are equal. */
-		public native boolean equals(Expr e);
+		public native boolean equals(Object e);
 
 		public native int hashCode();
 
diff --git a/src/runtime/java/org/grammaticalframework/pgf/PGF.java b/src/runtime/java/org/grammaticalframework/pgf/PGF.java
index c19264f62..346f6f67f 100644
--- a/src/runtime/java/org/grammaticalframework/pgf/PGF.java
+++ b/src/runtime/java/org/grammaticalframework/pgf/PGF.java
@@ -30,10 +30,10 @@ public class PGF {
 	 */
 	public native String getStartCat();
 	
-	/** Returns a list of with all functions in the grammar. */
+	/** Returns a list with all functions in the grammar. */
 	public native List<String> getFunctions();
 	
-	/** Returns a list of with all functions with a given return category.
+	/** Returns a list with all functions with a given return category.
 	 * @param cat The name of the return category. */
 	public native List<String> getFunctionsByCat(String cat);