diff --git a/srcpkgs/PrusaSlicer/patches/bfb135bcc3ac3f7d5cd65365a2f5944a78c7a250.patch b/srcpkgs/PrusaSlicer/patches/bfb135bcc3ac3f7d5cd65365a2f5944a78c7a250.patch
new file mode 100644
index 00000000000..fef18cf3ec8
--- /dev/null
+++ b/srcpkgs/PrusaSlicer/patches/bfb135bcc3ac3f7d5cd65365a2f5944a78c7a250.patch
@@ -0,0 +1,84 @@
+From bfb135bcc3ac3f7d5cd65365a2f5944a78c7a250 Mon Sep 17 00:00:00 2001
+From: Vojtech Kral <vojtech@kral.hk>
+Date: Fri, 2 Aug 2019 15:11:50 +0200
+Subject: [PATCH] Comment out stale implementation in Serial, fix #2150
+
+---
+ src/slic3r/GUI/FirmwareDialog.cpp |  2 +-
+ src/slic3r/Utils/Serial.cpp       |  3 +++
+ src/slic3r/Utils/Serial.hpp       | 14 +++++++++++++-
+ 3 files changed, 17 insertions(+), 2 deletions(-)
+
+diff --git a/src/slic3r/GUI/FirmwareDialog.cpp b/src/slic3r/GUI/FirmwareDialog.cpp
+index 7865aecf2..d1f2da040 100644
+--- src/slic3r/GUI/FirmwareDialog.cpp
++++ src/slic3r/GUI/FirmwareDialog.cpp
+@@ -354,7 +354,7 @@ bool FirmwareDialog::priv::check_model_id()
+ 	// Therefore, regretably, so far the check cannot be used and we just return true here.
+ 	// TODO: Rewrite Serial using more platform-native code.
+ 	return true;
+-	
++
+ 	// if (hex_file.model_id.empty()) {
+ 	// 	// No data to check against, assume it's ok
+ 	// 	return true;
+diff --git a/src/slic3r/Utils/Serial.cpp b/src/slic3r/Utils/Serial.cpp
+index cd2a01cbf..acfd5fafd 100644
+--- src/slic3r/Utils/Serial.cpp
++++ src/slic3r/Utils/Serial.cpp
+@@ -353,6 +353,8 @@ void Serial::set_baud_rate(unsigned baud_rate)
+ 	}
+ }
+ 
++
++/*
+ void Serial::set_DTR(bool on)
+ {
+ 	auto handle = native_handle();
+@@ -495,6 +497,7 @@ std::string Serial::printer_format_line(const std::string &line, unsigned line_n
+ 
+ 	return (boost::format("N%1% %2%*%3%\n") % line_num_str % line % checksum).str();
+ }
++*/
+ 
+ 
+ } // namespace Utils
+diff --git a/src/slic3r/Utils/Serial.hpp b/src/slic3r/Utils/Serial.hpp
+index 67d64b4ec..8bad75b31 100644
+--- src/slic3r/Utils/Serial.hpp
++++ src/slic3r/Utils/Serial.hpp
+@@ -46,6 +46,17 @@ class Serial : public boost::asio::serial_port
+ 	~Serial();
+ 
+ 	void set_baud_rate(unsigned baud_rate);
++
++	// The Serial implementation is currently in disarray and therefore commented out.
++	// The boost implementation seems to have several problems, such as lack of support
++	// for custom baud rates, few weird implementation bugs and a history of API breakages.
++	// It's questionable whether it solves more problems than causes. Probably not.
++	// TODO: Custom implementation not based on asio.
++	//
++	// As of now, this class is only kept for the purpose of rebooting AVR109,
++	// see FirmwareDialog::priv::avr109_reboot()
++
++/*
+ 	void set_DTR(bool on);
+ 
+ 	// Resets the line number both internally as well as with the firmware using M110
+@@ -68,7 +79,7 @@ class Serial : public boost::asio::serial_port
+ 
+ 	// Same as above, but with internally-managed line number
+ 	size_t printer_write_line(const std::string &line);
+-	
++
+ 	// Toggles DTR to reset the printer
+ 	void printer_reset();
+ 
+@@ -76,6 +87,7 @@ class Serial : public boost::asio::serial_port
+ 	static std::string printer_format_line(const std::string &line, unsigned line_num);
+ private:
+ 	unsigned m_line_num = 0;
++*/
+ };
+ 
+ 
diff --git a/srcpkgs/PrusaSlicer/template b/srcpkgs/PrusaSlicer/template
index b517d825b4f..fcae498faf2 100644
--- a/srcpkgs/PrusaSlicer/template
+++ b/srcpkgs/PrusaSlicer/template
@@ -1,7 +1,7 @@
 # Template file for 'PrusaSlicer'
 pkgname=PrusaSlicer
 version=2.0.0
-revision=2
+revision=3
 wrksrc="PrusaSlicer-version_${version}"
 build_style=cmake
 build_helper="qemu"