diff --git a/cura-engine-lulzbot.spec b/cura-engine-lulzbot.spec
index fdd6d6f..8519484 100644
--- a/cura-engine-lulzbot.spec
+++ b/cura-engine-lulzbot.spec
@@ -26,7 +26,7 @@ Conflicts:      cura-engine
 Url:            https://code.alephobjects.com/diffusion/CTE/cura-engine.git
 Source0:        CuraEngine-%{version}.tar.xz
 Source1:        CuraEngine.1
-#Patch1:         fix-build.patch
+Patch1:         fix-build.patch
 %if 0%{?suse_version} < 1500
 BuildRequires:  gcc6-c++
 #!BuildIgnore:  libgcc_s1
@@ -47,7 +47,7 @@ This is the LulzBot variation of the engine.
 
 %prep
 %setup -q -n CuraEngine-%version
-#%patch1 -p1
+%patch1 -p1
 
 %build
 %if 0%{?suse_version} < 1500
diff --git a/fix-build.patch b/fix-build.patch
new file mode 100644
index 0000000..941b52b
--- /dev/null
+++ b/fix-build.patch
@@ -0,0 +1,40 @@
+diff --git a/tests/arcus/MockSocket.cpp b/tests/arcus/MockSocket.cpp
+index 73cbb867..a72780e1 100644
+--- a/tests/arcus/MockSocket.cpp
++++ b/tests/arcus/MockSocket.cpp
+@@ -20,7 +20,7 @@ void MockSocket::sendMessage(Arcus::MessagePtr message)
+     sent_messages.push_back(message);
+ }
+ 
+-Arcus::MessagePtr MockSocket::takeNextMessage()
++Arcus::MessagePtr MockSocket::takeNextMessage(bool)
+ {
+     Arcus::MessagePtr result = received_messages.front();
+     received_messages.pop_front();
+@@ -39,4 +39,4 @@ Arcus::MessagePtr MockSocket::popMessageFromSendQueue()
+     return result;
+ }
+ 
+-} //namespace cura
+\ No newline at end of file
++} //namespace cura
+diff --git a/tests/arcus/MockSocket.h b/tests/arcus/MockSocket.h
+index 80370f49..f9e8050a 100644
+--- a/tests/arcus/MockSocket.h
++++ b/tests/arcus/MockSocket.h
+@@ -27,7 +27,7 @@ public:
+ 
+     //Catch these functions so that we can see whether they are called.
+     void sendMessage(Arcus::MessagePtr message) override;
+-    Arcus::MessagePtr takeNextMessage() override;
++    Arcus::MessagePtr takeNextMessage(bool) override;
+ 
+     //Helpers to store the sent and received messages.
+     void pushMessageToReceivedQueue(Arcus::MessagePtr message);
+@@ -38,4 +38,4 @@ public:
+ 
+ } //namespace cura
+ 
+-#endif //MOCKSOCKET_H
+\ No newline at end of file
++#endif //MOCKSOCKET_H