diff --git a/Sources/WasmKit/Execution/Instructions/Control.swift b/Sources/WasmKit/Execution/Instructions/Control.swift
index b37d4bad..f9e82db4 100644
--- a/Sources/WasmKit/Execution/Instructions/Control.swift
+++ b/Sources/WasmKit/Execution/Instructions/Control.swift
@@ -10,7 +10,7 @@ extension ExecutionState {
 
     typealias BlockType = Instruction.BlockType
 
-    mutating func ifThen(runtime: Runtime, stack: inout Stack, elseOrEndRef: ExpressionRef, type: BlockType) {
+    mutating func ifThen(runtime: Runtime, stack: inout Stack, elseOrEndRef: ExpressionRef) {
         let isTrue = stack.popValue().i32 != 0
         if isTrue {
             programCounter += 1
diff --git a/Sources/WasmKit/Execution/Instructions/Instruction.swift b/Sources/WasmKit/Execution/Instructions/Instruction.swift
index 001e3c17..59720000 100644
--- a/Sources/WasmKit/Execution/Instructions/Instruction.swift
+++ b/Sources/WasmKit/Execution/Instructions/Instruction.swift
@@ -6,7 +6,7 @@ enum Instruction: Equatable {
     case globalSet(index: GlobalIndex)
     case unreachable
     case nop
-    case ifThen(elseOrEndRef: ExpressionRef, type: BlockType)
+    case ifThen(elseOrEndRef: ExpressionRef)
     case end
     case `else`(endRef: ExpressionRef)
     case br(offset: Int32, copyCount: UInt32, popCount: UInt32)
diff --git a/Sources/WasmKit/Execution/Runtime/InstDispatch.swift b/Sources/WasmKit/Execution/Runtime/InstDispatch.swift
index e5b67ae3..d13f6056 100644
--- a/Sources/WasmKit/Execution/Runtime/InstDispatch.swift
+++ b/Sources/WasmKit/Execution/Runtime/InstDispatch.swift
@@ -19,8 +19,8 @@ extension ExecutionState {
         case .nop:
             try self.nop(runtime: runtime, stack: &stack)
             return true
-        case .ifThen(let elseOrEndRef, let type):
-            self.ifThen(runtime: runtime, stack: &stack, elseOrEndRef: elseOrEndRef, type: type)
+        case .ifThen(let elseOrEndRef):
+            self.ifThen(runtime: runtime, stack: &stack, elseOrEndRef: elseOrEndRef)
             return true
         case .end:
             self.end(runtime: runtime, stack: &stack)
diff --git a/Sources/WasmKit/Translator.swift b/Sources/WasmKit/Translator.swift
index 18101563..dfc8b072 100644
--- a/Sources/WasmKit/Translator.swift
+++ b/Sources/WasmKit/Translator.swift
@@ -423,7 +423,7 @@ struct InstructionTranslator: InstructionVisitor {
             } else {
                 elseOrEndRef = ExpressionRef(from: selfPC, to: endPC)
             }
-            return .ifThen(elseOrEndRef: elseOrEndRef, type: Instruction.BlockType(blockType))
+            return .ifThen(elseOrEndRef: elseOrEndRef)
         }
     }
     
diff --git a/Utilities/generate_inst_dispatch.swift b/Utilities/generate_inst_dispatch.swift
index 08eadf4a..b4f35864 100644
--- a/Utilities/generate_inst_dispatch.swift
+++ b/Utilities/generate_inst_dispatch.swift
@@ -133,7 +133,6 @@ let instructions: [Instruction] = [
     Instruction(name: "ifThen", isControl: true, immediates: [
         // elseRef for if-then-else-end sequence, endRef for if-then-end sequence
         Immediate(name: "elseOrEndRef", type: "ExpressionRef"),
-        Immediate(name: "type", type: "BlockType")
     ]),
     Instruction(name: "end", isControl: true, immediates: []),
     Instruction(name: "`else`", isControl: true, immediates: [