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 00000000000000..47d9e0dea458a3
--- /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 172a6e42975310..edbed2794b21dd 100644
--- a/Modules/ossaudiodev.c
+++ b/Modules/ossaudiodev.c
@@ -1250,8 +1250,12 @@ 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