diff --git a/src/libslic3r/Format/PRUS.cpp b/src/libslic3r/Format/PRUS.cpp
index f79721be7..6c0b055d6 100644
--- a/src/libslic3r/Format/PRUS.cpp
+++ b/src/libslic3r/Format/PRUS.cpp
@@ -329,7 +329,7 @@ bool load_prus(const char *path, Model *model)
             if (! mz_zip_reader_file_stat(&archive, i, &stat))
                 continue;
             std::vector<char> buffer;
-            buffer.assign((size_t)stat.m_uncomp_size + 1, 0);
+            buffer.assign((size_t)stat.m_uncomp_size, 0);
             res = mz_zip_reader_extract_file_to_mem(&archive, stat.m_filename, (char*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
             if (res == MZ_FALSE)
                 std::runtime_error(std::string("Error while extracting a file from ") + path);
diff --git a/src/libslic3r/GCode/WipeTowerPrusaMM.cpp b/src/libslic3r/GCode/WipeTowerPrusaMM.cpp
index b0da3a210..f87969505 100644
--- a/src/libslic3r/GCode/WipeTowerPrusaMM.cpp
+++ b/src/libslic3r/GCode/WipeTowerPrusaMM.cpp
@@ -487,7 +487,6 @@ WipeTowerPrusaMM::material_type WipeTowerPrusaMM::parse_material(const char *nam
 	return INVALID;
 }
 
-
 // Returns gcode to prime the nozzles at the front edge of the print bed.
 WipeTower::ToolChangeResult WipeTowerPrusaMM::prime(
 	// print_z of the first layer.
diff --git a/src/slic3r/GUI/GLCanvas3D.hpp b/src/slic3r/GUI/GLCanvas3D.hpp
index ebc2929d9..eecc3261b 100644
--- a/src/slic3r/GUI/GLCanvas3D.hpp
+++ b/src/slic3r/GUI/GLCanvas3D.hpp
@@ -155,7 +155,7 @@ class GLCanvas3D
 //        float distance;
 #if !ENABLE_CONSTRAINED_CAMERA_TARGET
         Vec3d target;
-#endif !// ENABLE_CONSTRAINED_CAMERA_TARGET
+#endif // ENABLE_CONSTRAINED_CAMERA_TARGET
 
     private:
 #if ENABLE_CONSTRAINED_CAMERA_TARGET