diff --git a/libwvdrmengine/cdm/core/src/oemcrypto_adapter_dynamic.cpp b/libwvdrmengine/cdm/core/src/oemcrypto_adapter_dynamic.cpp
index 280ac36d..9c847cdb 100644
--- a/libwvdrmengine/cdm/core/src/oemcrypto_adapter_dynamic.cpp
+++ b/libwvdrmengine/cdm/core/src/oemcrypto_adapter_dynamic.cpp
@@ -754,6 +754,10 @@ class Adapter {
     LOOKUP_ALL(8, Initialize, OEMCrypto_Initialize);
     LOOKUP_ALL(8, APIVersion, OEMCrypto_APIVersion);
     LOOKUP_ALL(8, Terminate, OEMCrypto_Terminate);
+    if (level1_.Initialize == nullptr || level1_.APIVersion == nullptr ||
+        level1_.Terminate == nullptr) {
+      level1_valid_ = false;
+    }
     if (!level1_valid_) {
       metrics->OemCryptoDynamicAdapterMetrics::SetInitializationMode(
           wvcdm::metrics::OEMCrypto_INITIALIZED_USING_L3_INVALID_L1);