diff --git a/src/Makefile b/src/Makefile
index 2ef54aa10..7ae04a2fa 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -45,8 +45,9 @@ endif
 endif
 
 USEASM?=true
-# Do we use our assembly spinlock?
+# Do we use our assembly spinlock? X64 only
 ifeq ($(uname_S),Linux)
+ifeq ($(uname_M),x86_64)
 ifneq ($(@@),32bit)
 ifeq ($(USEASM),true)
 	ASM_OBJ+= fastlock_x64.o
@@ -55,6 +56,7 @@ ifeq ($(USEASM),true)
 endif
 endif
 endif
+endif
 
 ifeq ($(COMPILER_NAME),clang)
 	CXXFLAGS+= -stdlib=libc++