diff --git a/libavutil/x86/tx_float.asm b/libavutil/x86/tx_float.asm
index 42006848f1..16165580a6 100644
--- a/libavutil/x86/tx_float.asm
+++ b/libavutil/x86/tx_float.asm
@@ -1796,7 +1796,7 @@ cglobal fft_pfa_15xM_float, 4, 14, 16, 320, ctx, out, in, stride, len, lut, buf,
     mov btmpq, outq
 
     mov outq, [ctxq + AVTXContext.tmp]
-%if %2 == 0
+%if !%2
     movsxd lenq, dword [ctxq + AVTXContext.len]
     mov lutq, [ctxq + AVTXContext.map]
 %endif