diff --git a/config.mk b/config.mk
index 9e76b69..b5c5f15 100644
--- a/config.mk
+++ b/config.mk
@@ -1,6 +1,6 @@
 # Supported: GCC, CLANG, ICC
 TAG ?= GCC
-ENABLE_OPENMP = false
+ENABLE_OPENMP ?= false
 
 #Feature options
 OPTIONS  =  -DSIZE=40000000ull