diff --git a/src/makefile b/src/makefile
index e81c15932..87fbac0c2 100644
--- a/src/makefile
+++ b/src/makefile
@@ -7,6 +7,8 @@
 #    You can consider removing -Xcompiler "/wd 4819"
 # 3) Add -DUSE_PLUMED to CFLAGS when use the PLUMED plugin
 #    and remove it otherwise.
+# 4) Add -DUSE_TABLE to speed up MD simulations with NEP
+#    using pre-computed radial functions in the descriptors
 ###########################################################