diff --git a/ydb/library/yql/minikql/computation/mkql_computation_pattern_cache.cpp b/ydb/library/yql/minikql/computation/mkql_computation_pattern_cache.cpp
index 8a4c9e70cece..1bd38fe24b73 100644
--- a/ydb/library/yql/minikql/computation/mkql_computation_pattern_cache.cpp
+++ b/ydb/library/yql/minikql/computation/mkql_computation_pattern_cache.cpp
@@ -77,7 +77,7 @@ class TComputationPatternLRUCache::TLRUPatternCacheImpl
 
         const auto& entry = it->second.Entry;
 
-        Y_ENSURE(entry->Pattern->IsCompiled());
+        Y_ASSERT(entry->Pattern->IsCompiled());
 
         if (it->second.LinkedInCompiledPatternLRUList()) {
             return;