diff --git a/src/bitcoin.c b/src/bitcoin.c
index 288dade3..c8444261 100644
--- a/src/bitcoin.c
+++ b/src/bitcoin.c
@@ -307,7 +307,7 @@ out:
 	return ret;
 }
 
-bool submit_block(connsock_t *cs, char *params)
+bool submit_block(connsock_t *cs, const char *params)
 {
 	json_t *val, *res_val;
 	int len, retries = 0;
@@ -355,6 +355,23 @@ out:
 	return ret;
 }
 
+void precious_block(connsock_t *cs, const char *params)
+{
+	char *rpc_req;
+	int len;
+
+	if (unlikely(!cs->alive)) {
+		LOGDEBUG("Failed to submit_txn due to connsock dead");
+		return;
+	}
+
+	len = strlen(params) + 64;
+	rpc_req = ckalloc(len);
+	sprintf(rpc_req, "{\"method\": \"preciousblock\", \"params\": [\"%s\"]}\n", params);
+	json_rpc_msg(cs, rpc_req);
+	dealloc(rpc_req);
+}
+
 void submit_txn(connsock_t *cs, const char *params)
 {
 	char *rpc_req;
diff --git a/src/bitcoin.h b/src/bitcoin.h
index e1672d59..a27c91f3 100644
--- a/src/bitcoin.h
+++ b/src/bitcoin.h
@@ -38,7 +38,8 @@ void clear_gbtbase(gbtbase_t *gbt);
 int get_blockcount(connsock_t *cs);
 bool get_blockhash(connsock_t *cs, int height, char *hash);
 bool get_bestblockhash(connsock_t *cs, char *hash);
-bool submit_block(connsock_t *cs, char *params);
+bool submit_block(connsock_t *cs, const char *params);
+void precious_block(connsock_t *cs, const char *params);
 void submit_txn(connsock_t *cs, const char *params);
 char *get_txn(connsock_t *cs, const char *hash);
 
diff --git a/src/generator.c b/src/generator.c
index e5730e5f..5c3eaa52 100644
--- a/src/generator.c
+++ b/src/generator.c
@@ -312,7 +312,7 @@ static void clear_unix_msg(unix_msg_t **umsg)
 	}
 }
 
-bool generator_submitblock(ckpool_t *ckp, char *buf)
+bool generator_submitblock(ckpool_t *ckp, const char *buf)
 {
 	gdata_t *gdata = ckp->gdata;
 	server_instance_t *si;
@@ -330,6 +330,20 @@ bool generator_submitblock(ckpool_t *ckp, char *buf)
 	return submit_block(cs, buf);
 }
 
+void generator_preciousblock(ckpool_t *ckp, const char *hash)
+{
+	gdata_t *gdata = ckp->gdata;
+	server_instance_t *si;
+	connsock_t *cs;
+
+	if (unlikely(!(si = gdata->current_si))) {
+		LOGWARNING("No live current server in generator_get_blockhash");
+		return;
+	}
+	cs = &si->cs;
+	precious_block(cs, hash);
+}
+
 bool generator_get_blockhash(ckpool_t *ckp, int height, char *hash)
 {
 	gdata_t *gdata = ckp->gdata;
diff --git a/src/generator.h b/src/generator.h
index 775fc397..6e91c5b7 100644
--- a/src/generator.h
+++ b/src/generator.h
@@ -21,7 +21,8 @@ json_t *generator_genbase(ckpool_t *ckp);
 int generator_getbest(ckpool_t *ckp, char *hash);
 bool generator_checkaddr(ckpool_t *ckp, const char *addr);
 char *generator_get_txn(ckpool_t *ckp, const char *hash);
-bool generator_submitblock(ckpool_t *ckp, char *buf);
+bool generator_submitblock(ckpool_t *ckp, const char *buf);
+void generator_preciousblock(ckpool_t *ckp, const char *hash);
 bool generator_get_blockhash(ckpool_t *ckp, int height, char *hash);
 void *generator(void *arg);
 
diff --git a/src/stratifier.c b/src/stratifier.c
index 04359ab0..4b3fbf24 100644
--- a/src/stratifier.c
+++ b/src/stratifier.c
@@ -2126,16 +2126,17 @@ process_block(const workbase_t *wb, const char *coinbase, const int cblen,
 static bool local_block_submit(ckpool_t *ckp, char *gbt_block, const uchar *flip32, int height)
 {
 	bool ret = generator_submitblock(ckp, gbt_block);
+	char heighthash[68] = {}, rhash[68] = {};
+	uchar swap256[32];
 
 	free(gbt_block);
+	swap_256(swap256, flip32);
+	__bin2hex(rhash, swap256, 32);
+	generator_preciousblock(ckp, rhash);
+
 	/* Check failures that may be inconclusive but were submitted via other
-	 * means. */
+	 * means or accepted due to precious block call. */
 	if (!ret) {
-		char heighthash[68] = {}, rhash[68] = {};
-		uchar swap256[32];
-
-		swap_256(swap256, flip32);
-		__bin2hex(rhash, swap256, 32);
 		if (generator_get_blockhash(ckp, height, heighthash)) {
 			ret = !strncmp(rhash, heighthash, 64);
 			LOGWARNING("Hash for block height %d confirms block was %s",