diff --git a/Misc/NEWS.d/next/Library/2022-04-20-09-49-33.gh-issue-91734.4Dj4Gy.rst b/Misc/NEWS.d/next/Library/2022-04-20-09-49-33.gh-issue-91734.4Dj4Gy.rst
new file mode 100644
index 00000000000..47d9e0dea45
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-04-20-09-49-33.gh-issue-91734.4Dj4Gy.rst
@@ -0,0 +1 @@
+Fix OSS audio support on Solaris.
diff --git a/Modules/ossaudiodev.c b/Modules/ossaudiodev.c
index 2f507de46f5..0568b6dc441 100644
--- a/Modules/ossaudiodev.c
+++ b/Modules/ossaudiodev.c
@@ -1277,8 +1277,12 @@ PyInit_ossaudiodev(void)
     _EXPORT_INT(m, SNDCTL_DSP_GETSPDIF);
 #endif
     _EXPORT_INT(m, SNDCTL_DSP_GETTRIGGER);
+#ifdef SNDCTL_DSP_MAPINBUF
     _EXPORT_INT(m, SNDCTL_DSP_MAPINBUF);
+#endif
+#ifdef SNDCTL_DSP_MAPOUTBUF
     _EXPORT_INT(m, SNDCTL_DSP_MAPOUTBUF);
+#endif
     _EXPORT_INT(m, SNDCTL_DSP_NONBLOCK);
     _EXPORT_INT(m, SNDCTL_DSP_POST);
 #ifdef SNDCTL_DSP_PROFILE