diff --git a/libavcodec/x86/diracdsp_yasm.asm b/libavcodec/x86/diracdsp_yasm.asm
index 60edac999e..72f57e6049 100644
--- a/libavcodec/x86/diracdsp_yasm.asm
+++ b/libavcodec/x86/diracdsp_yasm.asm
@@ -241,7 +241,7 @@ cglobal add_dirac_obmc%1_%2, 6,6,5, dst, src, stride, obmc, yblen
 %endm
 
 INIT_MMX
-%ifndef ARCH_X86_64
+%if ARCH_X86_64 == 0
 PUT_RECT mmx
 ADD_RECT mmx
 
diff --git a/libavcodec/x86/dwt_yasm.asm b/libavcodec/x86/dwt_yasm.asm
index 71e7a79b66..ac6c505409 100644
--- a/libavcodec/x86/dwt_yasm.asm
+++ b/libavcodec/x86/dwt_yasm.asm
@@ -277,7 +277,7 @@ cglobal horizontal_compose_dd97i_ssse3, 3,6,8, b, tmp, w, x, w2, b_w2
     REP_RET
 
 
-%ifndef ARCH_X86_64
+%if ARCH_X86_64 == 0
 INIT_MMX
 COMPOSE_VERTICAL mmx
 HAAR_HORIZONTAL mmx, 0