diff --git a/src/V3EmitMk.cpp b/src/V3EmitMk.cpp
index 800cf589c..188047c3c 100644
--- a/src/V3EmitMk.cpp
+++ b/src/V3EmitMk.cpp
@@ -369,13 +369,13 @@ class EmitMkHierVerilation final {
 
         // Rules to process hierarchical blocks
         of.puts("\n# Verilate hierarchical blocks\n");
-        for (V3HierBlockPlan::const_iterator it = m_planp->begin(); it != m_planp->end(); ++it) {
-            const string prefix = it->second->hierPrefix();
-            const string argsFile = it->second->commandArgsFileName(false);
-            of.puts(it->second->hierGenerated(true));
+        for (const V3HierBlock* const blockp : m_planp->hierBlocksSorted()) {
+            const string prefix = blockp->hierPrefix();
+            const string argsFile = blockp->commandArgsFileName(false);
+            of.puts(blockp->hierGenerated(true));
             of.puts(": $(VM_HIER_INPUT_FILES) $(VM_HIER_VERILOG_LIBS) ");
             of.puts(V3Os::filenameNonDir(argsFile) + " ");
-            const V3HierBlock::HierBlockSet& children = it->second->children();
+            const V3HierBlock::HierBlockSet& children = blockp->children();
             for (V3HierBlock::HierBlockSet::const_iterator child = children.begin();
                  child != children.end(); ++child) {
                 of.puts((*child)->hierWrapper(true) + " ");
@@ -384,16 +384,16 @@ class EmitMkHierVerilation final {
             emitLaunchVerilator(of, argsFile);
 
             // Rule to build lib*.a
-            of.puts(it->second->hierLib(true));
+            of.puts(blockp->hierLib(true));
             of.puts(": ");
-            of.puts(it->second->hierMk(true));
+            of.puts(blockp->hierMk(true));
             of.puts(" ");
             for (V3HierBlock::HierBlockSet::const_iterator child = children.begin();
                  child != children.end(); ++child) {
                 of.puts((*child)->hierLib(true));
                 of.puts(" ");
             }
-            of.puts("\n\t$(MAKE) -f " + it->second->hierMk(false) + " -C " + prefix);
+            of.puts("\n\t$(MAKE) -f " + blockp->hierMk(false) + " -C " + prefix);
             of.puts(" VM_PREFIX=" + prefix);
             of.puts("\n\n");
         }