diff --git a/src/edge.c b/src/edge.c
index dedd6a0..32ce06d 100644
--- a/src/edge.c
+++ b/src/edge.c
@@ -74,7 +74,7 @@ node * r3_edge_branch(edge *e, int dl) {
     char *op = e->pattern;
     e->pattern = strndup(e->pattern, dl);
     e->pattern_len = dl;
-    zfree(op);
+
     return new_child;
 }
 
diff --git a/tests/bench_str.csv b/tests/bench_str.csv
index 603fd34..22df891 100644
--- a/tests/bench_str.csv
+++ b/tests/bench_str.csv
@@ -440,3 +440,4 @@
 1400607700,13972490.11
 1400655532,6648299.49
 1400655542,6685928.45
+1400659046,19754150.71