diff --git a/src/main/kotlin/ch/yvu/rxpect/mockito/DefaultValueGenerator.kt b/src/main/kotlin/ch/yvu/rxpect/mockito/DefaultValueGenerator.kt
index fc08866..3bf86ce 100644
--- a/src/main/kotlin/ch/yvu/rxpect/mockito/DefaultValueGenerator.kt
+++ b/src/main/kotlin/ch/yvu/rxpect/mockito/DefaultValueGenerator.kt
@@ -1,5 +1,6 @@
 package ch.yvu.rxpect.mockito
 
+import io.reactivex.Completable
 import io.reactivex.Maybe
 import io.reactivex.Observable
 import io.reactivex.Single
@@ -59,6 +60,9 @@ inline fun <reified T> defaultValue(): T? =
         Single::class -> {
             Single.never<Any>() as T
         }
+        Completable::class -> {
+            Completable.complete() as T
+        }
         else -> {
             null
         }
diff --git a/src/test/kotlin/ch/yvu/rxpect/mockito/DefaultValueGeneratorTest.kt b/src/test/kotlin/ch/yvu/rxpect/mockito/DefaultValueGeneratorTest.kt
index ce74498..3c465c7 100644
--- a/src/test/kotlin/ch/yvu/rxpect/mockito/DefaultValueGeneratorTest.kt
+++ b/src/test/kotlin/ch/yvu/rxpect/mockito/DefaultValueGeneratorTest.kt
@@ -1,5 +1,6 @@
 package ch.yvu.rxpect.mockito
 
+import io.reactivex.Completable
 import io.reactivex.Maybe
 import io.reactivex.Observable
 import io.reactivex.Single
@@ -123,6 +124,13 @@ class DefaultValueGeneratorTest {
         assertThat(value, `is`(Single.never<Int>()))
     }
 
+    @Test
+    fun generatesCompletable() {
+        val value = defaultValue<Completable>()
+
+        assertThat(value, `is`(Completable.complete()))
+    }
+
     @Test
     fun returnsNullForUnknownType() {
         val value = defaultValue<Runnable>()