1 files changed, 3 insertions, 3 deletions
diff --git a/gc.h b/gc.h
index 42ea4a8356..0bb70c5954 100644
--- a/gc.h
+++ b/gc.h
@@ -3,9 +3,9 @@
 #define RUBY_GC_H 1
 
 #if defined(__x86_64__) && defined(__GNUC__)
-#define SET_MACHINE_STACK_END(p) __asm__("mov %%rsp, %0" : "=r" (*p))
-#elif defined(__i386) && defined(__GNUC__)
-#define SET_MACHINE_STACK_END(p) __asm__("mov %%esp, %0" : "=r" (*p))
+#define SET_MACHINE_STACK_END(p) __asm__("movq\t%%rsp, %0" : "=r" (*p))
+#elif defined(__i386__) && defined(__GNUC__)
+#define SET_MACHINE_STACK_END(p) __asm__("movl\t%%esp, %0" : "=r" (*p))
 #else
 NOINLINE(void rb_gc_set_stack_end(VALUE **stack_end_p));
 #define SET_MACHINE_STACK_END(p) rb_gc_set_stack_end(p)