diff --git a/src/cc/prices.cpp b/src/cc/prices.cpp
index 90773a033..31a63f93d 100644
--- a/src/cc/prices.cpp
+++ b/src/cc/prices.cpp
@@ -865,8 +865,8 @@ int64_t prices_syntheticprice(std::vector<uint16_t> vec, int32_t height, int32_t
 
     pricedata = (int64_t *)calloc(sizeof(*pricedata) * 3, 1 + PRICES_DAYWINDOW * 2 + PRICES_SMOOTHWIDTH);
     depth = errcode = 0;
-    mpz_set_ui(mpzTotalPrice, 0);
-    mpz_set_ui(mpzDen, 0);
+    mpz_set_si(mpzTotalPrice, 0);
+    mpz_set_si(mpzDen, 0);
 
     for (i = 0; i < vec.size(); i++)
     {
@@ -875,7 +875,7 @@ int64_t prices_syntheticprice(std::vector<uint16_t> vec, int32_t height, int32_t
 
         mpz_set_ui(mpzResult, 0);  // clear result to test overflow (see below)
 
-        std::cerr << "prices_syntheticprice" << " i=" << i << " mpzTotalPrice=" << mpz_get_ui(mpzTotalPrice) << " value=" << value << " depth=" << depth <<  " opcode&KOMODO_PRICEMASK=" << (opcode & KOMODO_PRICEMASK) <<std::endl;
+        std::cerr << "prices_syntheticprice" << " i=" << i << " mpzTotalPrice=" << mpz_get_si(mpzTotalPrice) << " value=" << value << " depth=" << depth <<  " opcode&KOMODO_PRICEMASK=" << (opcode & KOMODO_PRICEMASK) <<std::endl;
         switch (opcode & KOMODO_PRICEMASK)
         {
         case 0: // indices