diff --git a/src/chain.h b/src/chain.h
index 95553c23c..5124f1197 100644
--- a/src/chain.h
+++ b/src/chain.h
@@ -20,7 +20,7 @@ class CChainPower;
 
 static const int SPROUT_VALUE_VERSION = 1001400;
 static const int SAPLING_VALUE_VERSION = 1010100;
-extern int32_t ASSETCHAINS_LWMAPOS;
+extern uint32_t ASSETCHAINS_LWMAPOS;
 
 struct CDiskBlockPos
 {