diff --git a/advanced_lab/c/Makefile b/advanced_lab/c/Makefile
index e08914905d1f1b6f334c9ab36255d4f701a1ef6e..d2f63409be5e9357a2a206a3db5471fa0a24aed6 100644
--- a/advanced_lab/c/Makefile
+++ b/advanced_lab/c/Makefile
@@ -1,6 +1,6 @@
 CC = cc
 ifeq ($(CRAY_PRGENVCRAY), loaded)
-CFLAGS = -O2 -homp
+CFLAGS = -O2 -openmp
 else ifeq ($(CRAY_PRGENVINTEL), loaded)
 CFLAGS = -O2 -openmp
 else ifeq ($(CRAY_PRGENVGNU), loaded)
diff --git a/advanced_lab/f90/Makefile b/advanced_lab/f90/Makefile
index c7d291edff2a45ad890909ac983c74656d582039..f9024308bfa829be311b1073410230ff418b5aec 100644
--- a/advanced_lab/f90/Makefile
+++ b/advanced_lab/f90/Makefile
@@ -1,6 +1,6 @@
 FC = ftn
 ifeq ($(CRAY_PRGENVCRAY), loaded)
-FFLAGS = -O2 -homp
+FFLAGS = -O2 -openmp
 else ifeq ($(CRAY_PRGENVINTEL), loaded)
 FFLAGS = -O2 -openmp
 else ifeq ($(CRAY_PRGENVGNU), loaded)