diff --git a/lfs/cmake b/lfs/cmake
index 5ad5ebb70..5b98644db 100644
--- a/lfs/cmake
+++ b/lfs/cmake
@@ -32,7 +32,7 @@ DL_FROM    = $(URL_IPFIRE)
 DIR_APP    = $(DIR_SRC)/$(THISAPP)
 TARGET     = $(DIR_INFO)/$(THISAPP)
 
-MAKETUNING = -j2
+MAX_PARALLELISM = $(shell echo $$(( $(SYSTEM_MEMORY) / 512)))
 
 ###############################################################################
 # Top-level Rules