diff --git a/src/main/scala/EX.scala b/src/main/scala/EX.scala
index bf69c80..e31f44e 100644
--- a/src/main/scala/EX.scala
+++ b/src/main/scala/EX.scala
@@ -21,8 +21,8 @@ class Execute extends MultiIOModule {
     ALUOps.AND  -> (io.op1 & io.op2),
     ALUOps.OR   -> (io.op1 | io.op2),
     ALUOps.XOR  -> (io.op1 ^ io.op2),
-    ALUOps.SLT  -> (io.op1 < io.op2).asSInt(),
-    ALUOps.SLTU -> (io.op1.asUInt() < io.op2.asUInt()).asSInt(),
+    ALUOps.SLT  -> Mux(io.op1 < io.op2, 1.S, 0.S),
+    ALUOps.SLTU -> Mux(io.op1.asUInt() < io.op2.asUInt(), 1.S, 0.S),
     ALUOps.SRA  -> (io.op1 >> io.op2(4, 0)),
     ALUOps.SRL  -> (io.op1.asUInt() >> io.op2(4, 0)).asSInt(),
     ALUOps.SLL  -> (io.op1.asUInt() << io.op2(4, 0)).asSInt(),
diff --git a/src/test/scala/Manifest.scala b/src/test/scala/Manifest.scala
index ca77290..dad7696 100644
--- a/src/test/scala/Manifest.scala
+++ b/src/test/scala/Manifest.scala
@@ -19,7 +19,7 @@ import LogParser._
 
 object Manifest {
 
-  val singleTest = "load2.s"
+  val singleTest = "arithImm.s"
 
   val nopPadded = true