diff --git a/src/libstore/include/nix/store/store-api.hh b/src/libstore/include/nix/store/store-api.hh
index 678c00d8d..fa1873502 100644
--- a/src/libstore/include/nix/store/store-api.hh
+++ b/src/libstore/include/nix/store/store-api.hh
@@ -902,11 +902,7 @@ struct StoreFactory
 
 struct Implementations
 {
-    static std::vector<StoreFactory> & registered()
-    {
-        static std::vector<StoreFactory> registered;
-        return registered;
-    }
+    static std::vector<StoreFactory> & registered();
 
     template<typename T, typename TConfig>
     static void add()
diff --git a/src/libstore/store-api.cc b/src/libstore/store-api.cc
index 49bbaecd7..7e5ce6e2e 100644
--- a/src/libstore/store-api.cc
+++ b/src/libstore/store-api.cc
@@ -1399,4 +1399,10 @@ std::list<ref<Store>> getDefaultSubstituters()
     return stores;
 }
 
+std::vector<StoreFactory> & Implementations::registered()
+{
+    static std::vector<StoreFactory> registered;
+    return registered;
+}
+
 }