diff --git a/include/r3.h b/include/r3.h
index 45bfde8..5b40380 100644
--- a/include/r3.h
+++ b/include/r3.h
@@ -56,6 +56,7 @@ struct _node {
 struct _edge {
     char * pattern;
     int    pattern_len;
+    int    opcode;
     bool   has_slug;
     node * child;
 };
diff --git a/src/edge.c b/src/edge.c
index 3f4d646..fe14b4c 100644
--- a/src/edge.c
+++ b/src/edge.c
@@ -28,6 +28,7 @@ edge * r3_edge_create(char * pattern, int pattern_len, node * child) {
     edge * e = (edge*) zmalloc( sizeof(edge) );
     e->pattern = pattern;
     e->pattern_len = pattern_len;
+    e->opcode = 0;
     e->child = child;
     return e;
 }