diff --git a/doc/manual/command-ref/nix-store.xml b/doc/manual/command-ref/nix-store.xml
index 1ddb5408d5d..d71f9d8e47d 100644
--- a/doc/manual/command-ref/nix-store.xml
+++ b/doc/manual/command-ref/nix-store.xml
@@ -936,7 +936,7 @@ $ nix-store --add ./foo.c
 
 <para>The operation <option>--add-fixed</option> adds the specified paths to
 the Nix store.  Unlike <option>--add</option> paths are registered using the
-specified hashing algorithm, resulting in the same output path as a fixed output
+specified hashing algorithm, resulting in the same output path as a fixed-output
 derivation.  This can be used for sources that are not available from a public
 url or broke since the download expression was written.
 </para>
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 147093fae26..6258bcb3347 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -3155,7 +3155,7 @@ void DerivationGoal::runChild()
                 // Only use nss functions to resolve hosts and
                 // services. Don’t use it for anything else that may
                 // be configured for this system. This limits the
-                // potential impurities introduced in fixed outputs.
+                // potential impurities introduced in fixed-outputs.
                 writeFile(chrootRootDir + "/etc/nsswitch.conf", "hosts: files dns\nservices: files\n");
 
                 ss.push_back("/etc/services");