diff --git a/libao2/ao_pulse.c b/libao2/ao_pulse.c
index 5140a5e5c5..4fbd0fc5c4 100644
--- a/libao2/ao_pulse.c
+++ b/libao2/ao_pulse.c
@@ -116,10 +116,14 @@ static const struct format_map_s {
 } format_maps[] = {
     {AF_FORMAT_S16_LE, PA_SAMPLE_S16LE},
     {AF_FORMAT_S16_BE, PA_SAMPLE_S16BE},
+#ifdef PA_SAMPLE_S32NE
     {AF_FORMAT_S32_LE, PA_SAMPLE_S32LE},
     {AF_FORMAT_S32_BE, PA_SAMPLE_S32BE},
+#endif
+#ifdef PA_SAMPLE_FLOAT32NE
     {AF_FORMAT_FLOAT_LE, PA_SAMPLE_FLOAT32LE},
     {AF_FORMAT_FLOAT_BE, PA_SAMPLE_FLOAT32BE},
+#endif
     {AF_FORMAT_U8, PA_SAMPLE_U8},
     {AF_FORMAT_MU_LAW, PA_SAMPLE_ULAW},
     {AF_FORMAT_A_LAW, PA_SAMPLE_ALAW},