diff --git a/doc/INSTALL.md b/doc/INSTALL.md
index 6b41cdb45..c4b318593 100644
--- a/doc/INSTALL.md
+++ b/doc/INSTALL.md
@@ -96,7 +96,7 @@ This will put you in a new shell to enter the following commands:
     make
     make check VALGRIND=0
 
-optionaly you can consider adding the `-j$(nproc)` flag after the `make` command to speed up the compilation.
+optionally, add `-j$(nproc)` after `make` to speed up compilation. (e.g. `make -j$(nproc)`)
 
 Running lightning: