diff --git a/src/ripple/app/misc/NetworkOPs.cpp b/src/ripple/app/misc/NetworkOPs.cpp
index e926f786ba1..a431b5562d3 100644
--- a/src/ripple/app/misc/NetworkOPs.cpp
+++ b/src/ripple/app/misc/NetworkOPs.cpp
@@ -3150,10 +3150,15 @@ NetworkOPsImp::transJson(
     }
 
     MultiApiJson multiObj({jvObj, jvObj});
-    static_assert(MultiApiJson::size == 2);
-    static_assert(RPC::apiMinimumSupportedVersion == 1);
-    for (unsigned apiVersion = 1, lastIndex = MultiApiJson::size;
-         apiVersion <= 2;
+    // Minimum supported API version must match index 0 in MultiApiJson
+    static_assert(apiVersionSelector(RPC::apiMinimumSupportedVersion)() == 0);
+    // Beta API version must match last index in MultiApiJson
+    static_assert(
+        apiVersionSelector(RPC::apiBetaVersion)() + 1  //
+        == MultiApiJson::size);
+    for (unsigned apiVersion = RPC::apiMinimumSupportedVersion,
+                  lastIndex = MultiApiJson::size;
+         apiVersion <= RPC::apiBetaVersion;
          ++apiVersion)
     {
         unsigned const index = apiVersionSelector(apiVersion)();
diff --git a/src/test/json/MultivarJson_test.cpp b/src/test/json/MultivarJson_test.cpp
index 1658ea711bf..8cb3a49aff2 100644
--- a/src/test/json/MultivarJson_test.cpp
+++ b/src/test/json/MultivarJson_test.cpp
@@ -18,6 +18,7 @@
 //==============================================================================
 
 #include <ripple/json/MultivarJson.h>
+#include <ripple/rpc/impl/RPCHelpers.h>
 
 #include <ripple/beast/unit_test.h>
 #include "ripple/beast/unit_test/suite.hpp"
@@ -244,6 +245,7 @@ struct MultivarJson_test : beast::unit_test::suite
         }
 
         {
+            // NOTE It's fine to change this test when we change API versions
             testcase("apiVersionSelector");
 
             static_assert(MultiApiJson::size == 2);
@@ -269,6 +271,19 @@ struct MultivarJson_test : beast::unit_test::suite
                 apiVersionSelector(
                     std::numeric_limits<unsigned int>::max())() == 1);
         }
+
+        {
+            // There should be no reson to change this test
+            testcase("apiVersionSelector invariants");
+
+            static_assert(
+                apiVersionSelector(RPC::apiMinimumSupportedVersion)() == 0);
+            static_assert(
+                apiVersionSelector(RPC::apiBetaVersion)() + 1  //
+                == MultiApiJson::size);
+
+            BEAST_EXPECT(MultiApiJson::size >= 1);
+        }
     }
 };