diff --git a/samples/ffi/sample_ffi_functions.dart b/samples/ffi/sample_ffi_functions.dart
index 5038ba816dd..749dc532dee 100644
--- a/samples/ffi/sample_ffi_functions.dart
+++ b/samples/ffi/sample_ffi_functions.dart
@@ -14,8 +14,8 @@ typedef NativeBinaryOp = Int32 Function(Int32, Int32);
 typedef UnaryOp = int Function(int);
 typedef BinaryOp = int Function(int, int);
 typedef GenericBinaryOp<T> = int Function(int, T);
-typedef NativeQuadOpSigned = Int64 Function(Int64, Int32, Int16, Int8);
-typedef NativeQuadOpUnsigned = Uint64 Function(Uint64, Uint32, Uint16, Uint8);
+typedef NativeQuadOpSigned = Int64 Function(Int8, Int16, Int32, Int64);
+typedef NativeQuadOpUnsigned = Uint64 Function(Uint8, Uint16, Uint32, Uint64);
 typedef NativeFunc4 = IntPtr Function(IntPtr);
 typedef NativeDoubleUnaryOp = Double Function(Double);
 typedef NativeFloatUnaryOp = Float Function(Float);
diff --git a/samples_2/ffi/sample_ffi_functions.dart b/samples_2/ffi/sample_ffi_functions.dart
index 1bf8ecc0063..53990aceb76 100644
--- a/samples_2/ffi/sample_ffi_functions.dart
+++ b/samples_2/ffi/sample_ffi_functions.dart
@@ -16,8 +16,8 @@ typedef NativeBinaryOp = Int32 Function(Int32, Int32);
 typedef UnaryOp = int Function(int);
 typedef BinaryOp = int Function(int, int);
 typedef GenericBinaryOp<T> = int Function(int, T);
-typedef NativeQuadOpSigned = Int64 Function(Int64, Int32, Int16, Int8);
-typedef NativeQuadOpUnsigned = Uint64 Function(Uint64, Uint32, Uint16, Uint8);
+typedef NativeQuadOpSigned = Int64 Function(Int8, Int16, Int32, Int64);
+typedef NativeQuadOpUnsigned = Uint64 Function(Uint8, Uint16, Uint32, Uint64);
 typedef NativeFunc4 = IntPtr Function(IntPtr);
 typedef NativeDoubleUnaryOp = Double Function(Double);
 typedef NativeFloatUnaryOp = Float Function(Float);