diff --git a/Make.inc b/Make.inc
index 569ffd1cee67a..a8e3c9b40284d 100644
--- a/Make.inc
+++ b/Make.inc
@@ -525,14 +525,9 @@ ISX86=1
 else ifeq ($(ARCH),x86_64)
 BINARY=64
 ISX86=1
-else ifneq (,$(findstring arm,$(ARCH)))
-ISX86=0
-else ifneq (,$(findstring powerpc,$(ARCH)))
-ISX86=0
-else ifneq (,$(findstring ppc,$(ARCH)))
-ISX86=0
 else
-$(error "unknown word-size for arch: $(ARCH)")
+# For all other architectures (ARM, PPC, AArch64, etc.)
+ISX86=0
 endif
 
 # If we are running on ARM, set certain options automatically