diff --git a/kernel/hashlib.h b/kernel/hashlib.h
index be759fdf0a4..9cf43da6ca5 100644
--- a/kernel/hashlib.h
+++ b/kernel/hashlib.h
@@ -90,6 +90,12 @@ template<> struct hash_ops<uint32_t> : hash_int_ops
 		return a;
 	}
 };
+template<> struct hash_ops<uint64_t> : hash_int_ops
+{
+	static inline unsigned int hash(uint64_t a) {
+		return mkhash((unsigned int)(a), (unsigned int)(a >> 32));
+	}
+};
 
 template<> struct hash_ops<std::string> {
 	static inline bool cmp(const std::string &a, const std::string &b) {
diff --git a/passes/opt/opt_merge.cc b/passes/opt/opt_merge.cc
index 4bcd5a18947..87ad01f00ec 100644
--- a/passes/opt/opt_merge.cc
+++ b/passes/opt/opt_merge.cc
@@ -267,7 +267,7 @@ struct OptMergeWorker
 			}
 
 			did_something = false;
-                        std::unordered_map<FingerPrint, RTLIL::Cell*> sharemap;
+                        dict<FingerPrint, RTLIL::Cell*> sharemap;
 			for (auto cell : cells)
 			{
 				if ((!mode_share_all && !ct.cell_known(cell->type)) || !cell->known())
diff --git a/passes/sat/recover_names.cc b/passes/sat/recover_names.cc
index 2d7e7f01cfa..4c30a363202 100644
--- a/passes/sat/recover_names.cc
+++ b/passes/sat/recover_names.cc
@@ -29,13 +29,6 @@
 
 USING_YOSYS_NAMESPACE
 
-template<> struct hashlib::hash_ops<uint64_t> : hashlib::hash_int_ops
-{
-	static inline unsigned int hash(uint64_t a) {
-		return mkhash((unsigned int)(a), (unsigned int)(a >> 32));
-	}
-};
-
 PRIVATE_NAMESPACE_BEGIN
 
 // xorshift128 params
@@ -453,7 +446,7 @@ struct RecoverNamesWorker {
     pool<IdString> comb_whiteboxes, buffer_types;
 
     // class -> (gold, (gate, inverted))
-    dict<equiv_cls_t, std::pair<pool<IdBit>, dict<IdBit, bool>>> cls2bits; 
+    dict<equiv_cls_t, std::pair<pool<IdBit>, dict<IdBit, bool>>> cls2bits;
 
     void analyse_boxes()
     {