diff --git a/src/libFLAC/stream_encoder.c b/src/libFLAC/stream_encoder.c
index e07ecfb7..37559589 100644
--- a/src/libFLAC/stream_encoder.c
+++ b/src/libFLAC/stream_encoder.c
@@ -735,7 +735,8 @@ FLAC_API FLAC__StreamEncoderState FLAC__stream_encoder_init(FLAC__StreamEncoder
 #ifdef FLAC__CPU_IA32
 		FLAC__ASSERT(encoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32);
 #ifdef FLAC__HAS_NASM
-		if(0 && encoder->private_->cpuinfo.data.ia32.sse) {
+#ifdef FLAC__SSE_OS
+		if(encoder->private_->cpuinfo.data.ia32.sse) {
 			if(encoder->protected_->max_lpc_order < 4)
 				encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_4;
 			else if(encoder->protected_->max_lpc_order < 8)
@@ -745,7 +746,9 @@ FLAC_API FLAC__StreamEncoderState FLAC__stream_encoder_init(FLAC__StreamEncoder
 			else
 				encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
 		}
-		else if(encoder->private_->cpuinfo.data.ia32._3dnow)
+		else
+#endif
+		if(encoder->private_->cpuinfo.data.ia32._3dnow)
 			encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_3dnow;
 		else
 			encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;