diff --git a/presentations/pasc/code/Makefile b/presentations/pasc/code/Makefile
index cc6e33264955f87c888fefc6cc0938a5b46a51a5..7e05b473e0056d4d8123c0bb6f21baea0d88e055 100644
--- a/presentations/pasc/code/Makefile
+++ b/presentations/pasc/code/Makefile
@@ -1,4 +1,4 @@
-TARGET=c
+TARGET=opencl
 
 ifeq ($(TARGET),cuda)
 	CUDALIBS=-lcudart -lcuda -lnvrtc
@@ -7,7 +7,7 @@ else ifeq ($(TARGET), opencl)
 endif
 
 CC=gcc
-FC=futhark
+FC=INCREMENTAL_FLATTENING=1 futhark
 OPTS=-Wall -Wextra -g -std=gnu11
 SANITIZERS=-fsanitize=address
 OPTIM=-O3