diff --git a/runtime/src/jet/DoubleRange.java b/runtime/src/jet/DoubleRange.java
index f69fbbd469f..96096705abb 100644
--- a/runtime/src/jet/DoubleRange.java
+++ b/runtime/src/jet/DoubleRange.java
@@ -35,6 +35,10 @@ public final class DoubleRange implements Range<Double>, NumberSequence<Double>
         return start <= item && item <= end;
     }
 
+    public boolean contains(double item) {
+        return start <= item && item <= end;
+    }
+
     @Override
     public Double getStart() {
         return start;
diff --git a/runtime/src/jet/FloatRange.java b/runtime/src/jet/FloatRange.java
index fa132549cd2..659052a2c63 100644
--- a/runtime/src/jet/FloatRange.java
+++ b/runtime/src/jet/FloatRange.java
@@ -35,6 +35,10 @@ public final class FloatRange implements Range<Float>, NumberSequence<Float> {
         return start <= item && item <= end;
     }
 
+    public boolean contains(float item) {
+        return start <= item && item <= end;
+    }
+
     @Override
     public Float getStart() {
         return start;