diff --git a/Makefile.arm64 b/Makefile.arm64
index c3fe583e4..23362b4e5 100644
--- a/Makefile.arm64
+++ b/Makefile.arm64
@@ -1,28 +1,38 @@
 ifneq ($(C_COMPILER), PGI)
 ifeq ($(CORE), ARMV8)
 CCOMMON_OPT += -march=armv8-a
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8-a
 endif
+endif
 
 ifeq ($(CORE), CORTEXA53)
 CCOMMON_OPT += -march=armv8-a -mtune=cortex-a53
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8-a -mtune=cortex-a53
 endif
+endif
 
 ifeq ($(CORE), CORTEXA57)
 CCOMMON_OPT += -march=armv8-a -mtune=cortex-a57
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8-a -mtune=cortex-a57
 endif
+endif
 
 ifeq ($(CORE), CORTEXA72)
 CCOMMON_OPT += -march=armv8-a -mtune=cortex-a72
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8-a -mtune=cortex-a72
 endif
+endif
 
 ifeq ($(CORE), CORTEXA73)
 CCOMMON_OPT += -march=armv8-a -mtune=cortex-a73
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8-a -mtune=cortex-a73
 endif
+endif
 
 # Use a72 tunings because Neoverse-N1 is only available
 # in GCC>=9
@@ -30,51 +40,71 @@ ifeq ($(CORE), NEOVERSEN1)
 ifeq ($(GCCVERSIONGTEQ7), 1)
 ifeq ($(GCCVERSIONGTEQ9), 1)
 CCOMMON_OPT += -march=armv8.2-a -mtune=neoverse-n1
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8.2-a -mtune=neoverse-n1
+endif
 else
 CCOMMON_OPT += -march=armv8.2-a -mtune=cortex-a72
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8.2-a -mtune=cortex-a72
 endif
+endif
 else
 CCOMMON_OPT += -march=armv8-a -mtune=cortex-a72
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8-a -mtune=cortex-a72
 endif
 endif
+endif
 
 ifeq ($(CORE), THUNDERX)
 CCOMMON_OPT += -march=armv8-a -mtune=thunderx
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8-a -mtune=thunderx
 endif
+endif
 
 ifeq ($(CORE), FALKOR)
 CCOMMON_OPT += -march=armv8-a -mtune=falkor
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8-a -mtune=falkor
 endif
+endif
 
 ifeq ($(CORE), THUNDERX2T99)
 CCOMMON_OPT += -march=armv8.1-a -mtune=thunderx2t99
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8.1-a -mtune=thunderx2t99
 endif
+endif
 
 ifeq ($(CORE), THUNDERX3T110)
 ifeq ($(GCCVERSIONGTEQ10), 1)
 CCOMMON_OPT += -march=armv8.3-a -mtune=thunderx3t110
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8.3-a -mtune=thunderx3t110
+endif
 else
 CCOMMON_OPT += -march=armv8.1-a -mtune=thunderx2t99
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8.1-a -mtune=thunderx2t99
 endif
 endif
+endif
 
 ifeq ($(CORE), VORTEX)
 CCOMMON_OPT += -march=armv8.3-a
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8.3-a
 endif
+endif
 
 ifeq ($(GCCVERSIONGTEQ9), 1)
 ifeq ($(CORE), TSV110)
 CCOMMON_OPT += -march=armv8.2-a -mtune=tsv110
+ifneq ($(F_COMPILER), NAG)
 FCOMMON_OPT += -march=armv8.2-a -mtune=tsv110
 endif
 endif
 endif
+endif