diff --git a/src/libstore/build/substitution-goal.cc b/src/libstore/build/substitution-goal.cc
index 5d88b8758..7b1ac126e 100644
--- a/src/libstore/build/substitution-goal.cc
+++ b/src/libstore/build/substitution-goal.cc
@@ -142,7 +142,7 @@ void PathSubstitutionGoal::tryNext()
     /* Bail out early if this substituter lacks a valid
        signature. LocalStore::addToStore() also checks for this, but
        only after we've downloaded the path. */
-    if (!sub->isTrusted && worker.store.pathInfoIsTrusted(*info))
+    if (!sub->isTrusted && worker.store.pathInfoIsUntrusted(*info))
     {
         warn("substituter '%s' does not have a valid signature for path '%s'",
             sub->getUri(), worker.store.printStorePath(storePath));
diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index 6bc963f27..950a9f74e 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -1103,7 +1103,7 @@ const PublicKeys & LocalStore::getPublicKeys()
     return *state->publicKeys;
 }
 
-bool LocalStore::pathInfoIsTrusted(const ValidPathInfo & info)
+bool LocalStore::pathInfoIsUntrusted(const ValidPathInfo & info)
 {
     return requireSigs && !info.checkSignatures(*this, getPublicKeys());
 }
@@ -1116,7 +1116,7 @@ bool LocalStore::realisationIsUntrusted(const Realisation & realisation)
 void LocalStore::addToStore(const ValidPathInfo & info, Source & source,
     RepairFlag repair, CheckSigsFlag checkSigs)
 {
-    if (checkSigs && pathInfoIsTrusted(info))
+    if (checkSigs && pathInfoIsUntrusted(info))
         throw Error("cannot add path '%s' because it lacks a valid signature", printStorePath(info.path));
 
     addTempRoot(info.path);
diff --git a/src/libstore/local-store.hh b/src/libstore/local-store.hh
index d54609f01..c311d295a 100644
--- a/src/libstore/local-store.hh
+++ b/src/libstore/local-store.hh
@@ -136,7 +136,7 @@ public:
     void querySubstitutablePathInfos(const StorePathCAMap & paths,
         SubstitutablePathInfos & infos) override;
 
-    bool pathInfoIsTrusted(const ValidPathInfo &) override;
+    bool pathInfoIsUntrusted(const ValidPathInfo &) override;
     bool realisationIsUntrusted(const Realisation & ) override;
 
     void addToStore(const ValidPathInfo & info, Source & source,
diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh
index 0cd56d34e..b90aeaa4c 100644
--- a/src/libstore/store-api.hh
+++ b/src/libstore/store-api.hh
@@ -384,7 +384,7 @@ public:
        we don't really want to add the dependencies listed in a nar info we
        don't trust anyyways.
        */
-    virtual bool pathInfoIsTrusted(const ValidPathInfo &)
+    virtual bool pathInfoIsUntrusted(const ValidPathInfo &)
     {
         return true;
     }