diff --git a/_src/lib/node_cache.coffee b/_src/lib/node_cache.coffee
index 123d799..390bbd3 100644
--- a/_src/lib/node_cache.coffee
+++ b/_src/lib/node_cache.coffee
@@ -593,7 +593,7 @@ module.exports = class NodeCache extends EventEmitter
 			# if the data is a Promise, use defined default
 			# (can't calculate actual/resolved value size synchronously)
 			@options.promiseValueSize
-		else if typeof value is "object"
+		else if value? and typeof value is "object"
 			# if the data is an Object multiply each element with a defined default length
 			@options.objectValueSize * Object.keys( value ).length
 		else if typeof value is "boolean"
diff --git a/_src/test/mocha_test.coffee b/_src/test/mocha_test.coffee
index c56293c..8ff8e28 100644
--- a/_src/test/mocha_test.coffee
+++ b/_src/test/mocha_test.coffee
@@ -1143,4 +1143,24 @@ describe "`#{pkg.name}@#{pkg.version}` on `node@#{process.version}`", () ->
 
 		return
 
+	describe "Issues", () ->
+		describe("#151 - cannot set null", () ->
+			cache = null
+			before(() ->
+				cache = new nodeCache()
+				return
+			)
+
+			it("set the value `null` - this should not throw or otherwise fail", () ->
+				cache.set("test", null)
+				return
+			)
+
+			it("should also return `null`", () ->
+				should(cache.get("test")).be.null()
+				return
+			)
+			return
+		)
+		return
 	return