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-rw-r--r--miasm2/core/graph.py6
1 files changed, 3 insertions, 3 deletions
diff --git a/miasm2/core/graph.py b/miasm2/core/graph.py
index b0dc70d6..00c30d62 100644
--- a/miasm2/core/graph.py
+++ b/miasm2/core/graph.py
@@ -338,9 +338,9 @@ shape = "box"
                     if runner not in idoms:
                         continue
                     while runner != idoms[node]:
-                        if node not in frontier:
-                            frontier[node] = set()
+                        if runner not in frontier:
+                            frontier[runner] = set()
 
-                        frontier[node].add(runner)
+                        frontier[runner].add(node)
                         runner = idoms[runner]
         return frontier