diff --git a/Debian-10-(Buster)-Installation.md b/Debian-10-(Buster)-Installation.md
index 9296bb1..4800f1e 100644
--- a/Debian-10-(Buster)-Installation.md
+++ b/Debian-10-(Buster)-Installation.md
@@ -55,7 +55,7 @@ cd json-c
 git checkout json-c-0.13.1-20180305
 sh autogen.sh
 ./configure --enable-threading --prefix=/usr/local
-CPUCOUNT=$(grep processor /proc/cpuinfo | wc -l)
+CPUCOUNT=$(nproc)
 make -j$CPUCOUNT
 sudo make install
 sudo ldconfig