diff --git a/configure.ac b/configure.ac
index c56bbf04a..8278353d4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -45,15 +45,15 @@ AC_SUBST(PA_API_VERSION, 12)
 AC_SUBST(PA_PROTOCOL_VERSION, 33)
 
 # The stable ABI for client applications, for the version info x:y:z
-# always will hold y=z
+# always will hold x=z
 AC_SUBST(LIBPULSE_VERSION_INFO, [21:1:21])
 
 # A simplified, synchronous, ABI-stable interface for client
-# applications, for the version info x:y:z always will hold y=z
+# applications, for the version info x:y:z always will hold x=z
 AC_SUBST(LIBPULSE_SIMPLE_VERSION_INFO, [1:1:1])
 
 # The ABI-stable GLib adapter for client applications, for the version
-# info x:y:z always will hold y=z
+# info x:y:z always will hold x=z
 AC_SUBST(LIBPULSE_MAINLOOP_GLIB_VERSION_INFO, [0:5:0])
 
 AC_CANONICAL_HOST
diff --git a/meson.build b/meson.build
index 45df103f0..a10a1b3c8 100644
--- a/meson.build
+++ b/meson.build
@@ -22,15 +22,15 @@ pa_api_version = 12
 pa_protocol_version = 33
 
 # The stable ABI for client applications, for the version info x:y:z
-# always will hold y=z
+# always will hold x=z
 libpulse_version_info = [21, 1, 21]
 
 # A simplified, synchronous, ABI-stable interface for client
-# applications, for the version info x:y:z always will hold y=z
+# applications, for the version info x:y:z always will hold x=z
 libpulse_simple_version_info = [1, 1, 1]
 
 # The ABI-stable GLib adapter for client applications, for the version
-# info x:y:z always will hold y=z
+# info x:y:z always will hold x=z
 libpulse_mainloop_glib_version_info = [0, 5, 0]
 
 libpulse_version = '@0@.@1@.@2@'.format(