diff --git a/src/libstore/remote-store.cc b/src/libstore/remote-store.cc
index 1200ab200..dc2efefeb 100644
--- a/src/libstore/remote-store.cc
+++ b/src/libstore/remote-store.cc
@@ -63,22 +63,6 @@ void writeStorePathCAMap(const Store & store, Sink & out, const StorePathCAMap &
     }
 }
 
-std::map<string, StorePath> readOutputPathMap(const Store & store, Source & from)
-{
-    std::map<string, StorePath> pathMap;
-    auto rawInput = readStrings<Strings>(from);
-    if (rawInput.size() % 2)
-        throw Error("got an odd number of elements from the daemon when trying to read a output path map");
-    auto curInput = rawInput.begin();
-    while (curInput != rawInput.end()) {
-        auto thisKey = *curInput++;
-        auto thisValue = *curInput++;
-        pathMap.emplace(thisKey, store.parseStorePath(thisValue));
-    }
-    return pathMap;
-}
-
-
 void write(const Store & store, Sink & out, const StorePath & storePath)
 {
 	auto path = store.printStorePath(storePath);
diff --git a/src/libstore/worker-protocol.hh b/src/libstore/worker-protocol.hh
index ad5854c85..117d3e1a4 100644
--- a/src/libstore/worker-protocol.hh
+++ b/src/libstore/worker-protocol.hh
@@ -126,6 +126,4 @@ StorePathCAMap readStorePathCAMap(const Store & store, Source & from);
 
 void writeStorePathCAMap(const Store & store, Sink & out, const StorePathCAMap & paths);
 
-void writeOutputPathMap(const Store & store, Sink & out, const OutputPathMap & paths);
-
 }