1diff --git a/third_party/lcms/include/lcms2.h b/third_party/lcms/include/lcms2.h
2index 739e6e1f8..c84a4fd93 100644
3--- a/third_party/lcms/include/lcms2.h
4+++ b/third_party/lcms/include/lcms2.h
5@@ -38,7 +38,7 @@
6 // #define CMS_DONT_USE_INT64        1
7
8 // Uncomment this if your compiler doesn't work with fast floor function
9-// #define CMS_DONT_USE_FAST_FLOOR 1
10+#define CMS_DONT_USE_FAST_FLOOR 1
11
12 // Uncomment this line if you want lcms to use the black point tag in profile,
13 // if commented, lcms will compute the black point by its own.
14