diff --git a/Makefile b/Makefile
index dee47de38b02c40b5e2364fc21e5fb78374f206b..768aff94cbcf545244d85d72d25b26088eca9e0a 100644
--- a/Makefile
+++ b/Makefile
@@ -41,7 +41,7 @@ debug: compile
 
 # For compiling on marconi
 marconi: F90 = mpiifort
-marconi: F90FLAGS = -O3 -xHOST
+marconi: F90FLAGS = -DNOLAPACK -O3 -xHOST
 marconi: EXEC = $(BINDIR)/gyacomo23_dp
 marconi: dirs src/srcinfo.h
 marconi: compile