diff --git a/src/libslic3r/Preset.cpp b/src/libslic3r/Preset.cpp
index 2eaf050039..bd1177e595 100644
--- a/src/libslic3r/Preset.cpp
+++ b/src/libslic3r/Preset.cpp
@@ -1,4 +1,4 @@
-#include <cassert>
+#include <cassert>
 
 #include "Config.hpp"
 #include "Exception.hpp"