diff --git a/src/evo/creditpool.cpp b/src/evo/creditpool.cpp
index e1b0bb3756694..c16950eba1f17 100644
--- a/src/evo/creditpool.cpp
+++ b/src/evo/creditpool.cpp
@@ -112,7 +112,8 @@ void CCreditPoolManager::AddToCache(const uint256& block_hash, int height, const
     }
 }
 
-static std::optional<CBlock> GetBlockForCreditPool(const CBlockIndex* const block_index, const Consensus::Params& consensusParams)
+static std::optional<CBlock> GetBlockForCreditPool(const gsl::not_null<const CBlockIndex*> block_index,
+                                                   const Consensus::Params& consensusParams)
 {
     // There's no CbTx before DIP0003 activation
     if (!DeploymentActiveAt(*block_index, Params().GetConsensus(), Consensus::DEPLOYMENT_DIP0003)) {
@@ -132,7 +133,8 @@ static std::optional<CBlock> GetBlockForCreditPool(const CBlockIndex* const bloc
     return block;
 }
 
-CCreditPool CCreditPoolManager::ConstructCreditPool(const CBlockIndex* const block_index, CCreditPool prev, const Consensus::Params& consensusParams)
+CCreditPool CCreditPoolManager::ConstructCreditPool(const gsl::not_null<const CBlockIndex*> block_index,
+                                                    CCreditPool prev, const Consensus::Params& consensusParams)
 {
     std::optional<CBlock> block = GetBlockForCreditPool(block_index, consensusParams);
     if (!block) {
@@ -213,7 +215,7 @@ CCreditPool CCreditPoolManager::ConstructCreditPool(const CBlockIndex* const blo
 
 CCreditPool CCreditPoolManager::GetCreditPool(const CBlockIndex* block_index, const Consensus::Params& consensusParams)
 {
-    std::stack<const CBlockIndex *> to_calculate;
+    std::stack<gsl::not_null<const CBlockIndex*>> to_calculate;
 
     std::optional<CCreditPool> poolTmp;
     while (block_index != nullptr && !(poolTmp = GetFromCache(*block_index)).has_value()) {
diff --git a/src/evo/creditpool.h b/src/evo/creditpool.h
index de6f13595b2eb..c27179edaa953 100644
--- a/src/evo/creditpool.h
+++ b/src/evo/creditpool.h
@@ -16,6 +16,7 @@
 
 #include <evo/assetlocktx.h>
 
+#include <gsl/pointers.h>
 #include <optional>
 #include <unordered_set>
 
@@ -134,7 +135,8 @@ class CCreditPoolManager
     std::optional<CCreditPool> GetFromCache(const CBlockIndex& block_index);
     void AddToCache(const uint256& block_hash, int height, const CCreditPool& pool);
 
-    CCreditPool ConstructCreditPool(const CBlockIndex* block_index, CCreditPool prev, const Consensus::Params& consensusParams);
+    CCreditPool ConstructCreditPool(const gsl::not_null<const CBlockIndex*> block_index, CCreditPool prev,
+                                    const Consensus::Params& consensusParams);
 };
 
 std::optional<CCreditPoolDiff> GetCreditPoolDiffForBlock(CCreditPoolManager& cpoolman, const BlockManager& blockman, const llmq::CQuorumManager& qman,