diff --git a/zig-impl/crystal/some-crystal-app/src/high-level-bindings.cr b/zig-impl/crystal/some-crystal-app/src/high-level-bindings.cr
index 090ee0f..33c3606 100644
--- a/zig-impl/crystal/some-crystal-app/src/high-level-bindings.cr
+++ b/zig-impl/crystal/some-crystal-app/src/high-level-bindings.cr
@@ -48,6 +48,10 @@ class IPC
 		fd
 	end
 
+	def timer(value : LibC::Int)
+		LibIPC.timer(@context, value)
+	end
+
 	def write(fd : Int, string : String)
 		self.write(fd, string.to_unsafe, string.size.to_u64)
 	end
@@ -58,6 +62,10 @@ class IPC
 		end
 	end
 
+	def write(fd : Int32, buffer : Bytes)
+		self.write(fd, buffer.to_unsafe, buffer.size.to_u64)
+	end
+
 	def schedule(fd : Int32, string : String)
 		self.schedule(fd, string.to_unsafe, string.size.to_u64)
 	end
@@ -66,6 +74,10 @@ class IPC
 		self.schedule(fd, buffer.to_unsafe, buflen.to_u64)
 	end
 
+	def schedule(fd : Int32, buffer : Bytes)
+		self.schedule(fd, buffer.to_unsafe, buffer.size.to_u64)
+	end
+
 	def schedule(fd : Int32, buffer : UInt8*, buflen : UInt64)
 		if LibIPC.schedule(@context, fd, buffer, buflen) != 0
 			raise "oh noes, 'schedule' iz brkn"
diff --git a/zig-impl/crystal/some-crystal-app/src/message.cr b/zig-impl/crystal/some-crystal-app/src/message.cr
index 37f0fed..f3762a0 100644
--- a/zig-impl/crystal/some-crystal-app/src/message.cr
+++ b/zig-impl/crystal/some-crystal-app/src/message.cr
@@ -15,7 +15,7 @@ module IPCMessage
 		def initialize(@payload)
 		end
 
-		def self.deserialize(payload) : UntypedMessage
+		def self.deserialize(payload : Bytes) : UntypedMessage
 			IPCMessage::UntypedMessage.new payload
 		end
 
@@ -49,7 +49,7 @@ module IPCMessage
 		def serialize
 			bytes = Bytes.new (1 + @payload.size)
 			type = @type
-			bytes[0] = type.nil? ? 0 : type
+			bytes[0] = type.nil? ? 0.to_u8 : type
 			bytes[1..].copy_from @payload
 			bytes
 		end
@@ -60,10 +60,10 @@ end
 class IPC
 	def schedule(fd : Int32, m : (IPCMessage::TypedMessage | IPCMessage::UntypedMessage))
 		payload = m.serialize
-		schedule fd, payload, payload.size
+		schedule fd, payload
 	end
 	def write(fd : Int32, m : (IPCMessage::TypedMessage | IPCMessage::UntypedMessage))
 		payload = m.serialize
-		write fd, payload, payload.size
+		write fd, payload
 	end
 end