diff --git a/src/2_build_kernel.sh b/src/2_build_kernel.sh
index 0b406adab..bbe958721 100755
--- a/src/2_build_kernel.sh
+++ b/src/2_build_kernel.sh
@@ -17,6 +17,7 @@ sed -i "s/.*CONFIG_DEFAULT_HOSTNAME.*/CONFIG_DEFAULT_HOSTNAME=\"minimal\"/" .con
 # Compile the kernel
 # Good explanation of the different kernels
 # http://unix.stackexchange.com/questions/5518/what-is-the-difference-between-the-following-kernel-makefile-terms-vmlinux-vmlinux
+# TODO - Suggested by Ronny Kalusniok - test this for parallel compilation: "make bzImage -j $(grep ^processor /proc/cpuinfo)".
 make bzImage
 
 cd ../../..
diff --git a/src/4_build_busybox.sh b/src/4_build_busybox.sh
index 7c457dfa5..9d0360f73 100755
--- a/src/4_build_busybox.sh
+++ b/src/4_build_busybox.sh
@@ -16,6 +16,7 @@ make defconfig
 sed -i "s/.*CONFIG_STATIC.*/CONFIG_STATIC=y/" .config
 
 # Compile busybox
+# TODO - Suggested by Ronny Kalusniok - test this for parallel compilation: "make busybox -j $(grep ^processor /proc/cpuinfo)".
 make busybox
 
 # Create the symlinks for busybox