diff --git a/advanced_lab/c/Makefile b/advanced_lab/c/Makefile
index eca887666570fa958663b507fcefaa7de9250783..68aecb037883a2b9efaf52cdba9d5430425d40a8 100644
--- a/advanced_lab/c/Makefile
+++ b/advanced_lab/c/Makefile
@@ -1,5 +1,5 @@
 CC = cc
-CFLAGS = -O2 -mp
+CFLAGS = -O2 -homp
 SRC = vtk_export.c shwater2d.c
 OBJS = ${SRC:.c=.o}
 DEST = shwater2d
diff --git a/advanced_lab/f90/Makefile b/advanced_lab/f90/Makefile
index dec9c33ae919f2a265d8fa6b9c9e9d3072259d7a..cea42e262be17c0f327df549bb3ff87c93dbd8db 100644
--- a/advanced_lab/f90/Makefile
+++ b/advanced_lab/f90/Makefile
@@ -1,5 +1,5 @@
 F90 = ftn
-FFLAGS = -O2 -mp
+FFLAGS = -O2 -homp
 SRC = vtk_export.f90 shwater2d.f90
 OBJS = ${SRC:.f90=.o}
 DEST = shwater2d