diff --git a/staging/src/k8s.io/code-generator/cmd/validation-gen/validation.go b/staging/src/k8s.io/code-generator/cmd/validation-gen/validation.go
index 579a98fc5a7..6c5de32f659 100644
--- a/staging/src/k8s.io/code-generator/cmd/validation-gen/validation.go
+++ b/staging/src/k8s.io/code-generator/cmd/validation-gen/validation.go
@@ -408,6 +408,13 @@ func (td *typeDiscoverer) discoverType(t *types.Type, fldPath *field.Path) (*typ
 		} else if validations.Empty() {
 			klog.V(6).InfoS("no type-attached validations", "type", t)
 		} else {
+			// TODO: This check is placed here to allow map-of-slices fields to exist in the type
+			// system, while preventing validation on them since that functionality is not yet
+			// implemented. Once validation support for map-of-slices is added, this check should
+			// be removed.
+			if unalias(t).Kind == types.Map && unalias(t).Elem.Kind == types.Slice {
+				return nil, fmt.Errorf("field %s: validation for map of slices is not supported", fldPath)
+			}
 			klog.V(5).InfoS("found type-attached validations", "n", validations.Len(), "type", t)
 			thisNode.typeValidations.Add(validations)
 		}
@@ -575,6 +582,13 @@ func (td *typeDiscoverer) discoverStruct(thisNode *typeNode, fldPath *field.Path
 			klog.V(6).InfoS("no field-attached validations", "field", childPath)
 		} else {
 			klog.V(5).InfoS("found field-attached validations", "n", validations.Len(), "field", childPath)
+			// TODO: This check is placed here to allow map-of-slices fields to exist in the type
+			// system, while preventing validation on them since that functionality is not yet
+			// implemented. Once validation support for map-of-slices is added, this check should
+			// be removed.
+			if unalias(childType).Kind == types.Map && unalias(childType).Elem.Kind == types.Slice {
+				return fmt.Errorf("field %s: validation for map of slices is not supported", childPath)
+			}
 			child.fieldValidations.Add(validations)
 			if len(validations.Variables) > 0 {
 				return fmt.Errorf("%v: variable generation is not supported for field validations", childPath)