diff --git a/com.ibm.wala.core/src/com/ibm/wala/dataflow/IFDS/PartiallyCollapsedSupergraph.java b/com.ibm.wala.core/src/com/ibm/wala/dataflow/IFDS/PartiallyCollapsedSupergraph.java
index ff0d9aac0..5b110ecc0 100644
--- a/com.ibm.wala.core/src/com/ibm/wala/dataflow/IFDS/PartiallyCollapsedSupergraph.java
+++ b/com.ibm.wala.core/src/com/ibm/wala/dataflow/IFDS/PartiallyCollapsedSupergraph.java
@@ -107,7 +107,7 @@ public class PartiallyCollapsedSupergraph extends AbstractGraph<Object> implemen
    */
   @SuppressWarnings("unchecked")
   public PartiallyCollapsedSupergraph(CallGraph cg, Collection<CGNode> noCollapse) {
-    this(cg, noCollapse, IndiscriminateFilter.singleton());
+    this(cg, noCollapse, IndiscriminateFilter.<CGNode>singleton());
   }
 
   /**
diff --git a/com.ibm.wala.core/src/com/ibm/wala/ipa/cfg/AbstractInterproceduralCFG.java b/com.ibm.wala.core/src/com/ibm/wala/ipa/cfg/AbstractInterproceduralCFG.java
index 89895fa6e..13d9ed80c 100644
--- a/com.ibm.wala.core/src/com/ibm/wala/ipa/cfg/AbstractInterproceduralCFG.java
+++ b/com.ibm.wala.core/src/com/ibm/wala/ipa/cfg/AbstractInterproceduralCFG.java
@@ -91,7 +91,7 @@ public abstract class AbstractInterproceduralCFG<T extends ISSABasicBlock> imple
    */
   @SuppressWarnings("unchecked")
   public AbstractInterproceduralCFG(CallGraph CG) {
-    this(CG, IndiscriminateFilter.singleton());
+    this(CG, IndiscriminateFilter.<CGNode>singleton());
   }
 
   /**
diff --git a/com.ibm.wala.core/src/com/ibm/wala/util/IndiscriminateFilter.java b/com.ibm.wala.core/src/com/ibm/wala/util/IndiscriminateFilter.java
index c6899a412..c92b8ed13 100644
--- a/com.ibm.wala.core/src/com/ibm/wala/util/IndiscriminateFilter.java
+++ b/com.ibm.wala.core/src/com/ibm/wala/util/IndiscriminateFilter.java
@@ -21,7 +21,7 @@ import com.ibm.wala.util.collections.Filter;
  */
 public class IndiscriminateFilter<T> implements Filter<T> {
 
-  public static <T> IndiscriminateFilter singleton() {
+  public static <T> IndiscriminateFilter<T> singleton() {
     return new IndiscriminateFilter<T>();
   }