diff --git a/extensions/openpower-pels/registry.cpp b/extensions/openpower-pels/registry.cpp
index 755e829..11785d9 100644
--- a/extensions/openpower-pels/registry.cpp
+++ b/extensions/openpower-pels/registry.cpp
@@ -556,12 +556,9 @@
 
     if (it == callouts.end())
     {
-        log<level::WARNING>(
-            "No callout entry found for the AdditionalData value used",
-            entry("AD_VALUE=%s", adValue->c_str()));
-
-        throw std::runtime_error{
-            "No callout entry found for the AdditionalData value used"};
+        // This can happen if not all possible values were in the
+        // message registry and that's fine.
+        return std::vector<RegistryCallout>{};
     }
 
     // Proceed to find the callouts possibly based on system type.
diff --git a/test/openpower-pels/registry_test.cpp b/test/openpower-pels/registry_test.cpp
index 2b5e482..be23b82 100644
--- a/test/openpower-pels/registry_test.cpp
+++ b/test/openpower-pels/registry_test.cpp
@@ -642,12 +642,12 @@
             EXPECT_EQ(callouts[0].symbolicFRUTrusted, "");
         }
         {
-            // There is no entry for PROC_NUM 2, it will fail.
+            // There is no entry for PROC_NUM 2, so no callouts
             std::vector<std::string> adData{"PROC_NUM=2"};
             AdditionalData ad{adData};
 
-            EXPECT_THROW(Registry::getCallouts(json, names, ad),
-                         std::runtime_error);
+            auto callouts = Registry::getCallouts(json, names, ad);
+            EXPECT_TRUE(callouts.empty());
         }
     }
 }