diff --git a/scripts/base/frameworks/config/main.zeek b/scripts/base/frameworks/config/main.zeek
index e2cfb11c8a..5fe7f6eaaf 100644
--- a/scripts/base/frameworks/config/main.zeek
+++ b/scripts/base/frameworks/config/main.zeek
@@ -124,8 +124,13 @@ function format_value(value: any) : string
 	{
 	local tn = type_name(value);
 	local part: string_vec = vector();
-	if ( /^set/ in tn )
+
+	if ( /^set/ in tn && strstr(tn, ",") == 0 )
 		{
+		# The conversion to set here is tricky and assumes
+		# that the set isn't indexed via a tuple of types.
+		# The above check for commas in the type name
+		# ensures this.
 		local it: set[bool] = value;
 		for ( sv in it )
 			part += cat(sv);
diff --git a/src/input/Manager.cc b/src/input/Manager.cc
index 27b47491eb..e065b87566 100644
--- a/src/input/Manager.cc
+++ b/src/input/Manager.cc
@@ -833,7 +833,12 @@ bool Manager::IsCompatibleType(Type* t, bool atomic_only)
 		if ( ! t->IsSet() )
 			return false;
 
-		return IsCompatibleType(t->AsSetType()->GetIndices()->GetPureType().get(), true);
+		const auto& indices = t->AsSetType()->GetIndices();
+
+		if ( indices->GetTypes().size() != 1 )
+			return false;
+
+		return IsCompatibleType(indices->GetPureType().get(), true);
 		}
 
 	case TYPE_VECTOR: