diff --git a/src/Fake.hs b/src/Fake.hs
index 9cc9a74..0f2d12d 100644
--- a/src/Fake.hs
+++ b/src/Fake.hs
@@ -364,6 +364,8 @@ eval (FunctionCall (Function "randomChar" [])) = randomChar
 eval (FunctionCall (Function "randomInt" [])) = randomInt (IntLiteral 0) (IntLiteral 2147483647)
 eval (FunctionCall (Function "randomInt" [upper])) = randomInt (IntLiteral 0) upper
 eval (FunctionCall (Function "randomInt" [lower, upper])) = randomInt lower upper
+eval (FunctionCall (Function "randomDouble" [])) = randomDouble (DoubleLiteral 0) (DoubleLiteral 1.7976931348623157E308)
+eval (FunctionCall (Function "randomDouble" [upper])) = randomDouble (DoubleLiteral 0) upper
 eval (FunctionCall (Function "randomDouble" [lower, upper])) = randomDouble lower upper
 eval (FunctionCall (Function "randomDate" [])) = dayAsValue <$> randomDate Nothing Nothing
 eval (FunctionCall (Function "randomDate" [lower, upper])) = do