diff --git a/experiments/intpips/Makefile b/experiments/intpips/Makefile
index 403ce651..d2111cbc 100644
--- a/experiments/intpips/Makefile
+++ b/experiments/intpips/Makefile
@@ -1,5 +1,5 @@
 
-N := 1
+N := 5
 SPECIMENS := $(addprefix specimen_,$(shell seq -f '%03.0f' $(N)))
 SPECIMENS_OK := $(addsuffix /OK,$(SPECIMENS))
 
diff --git a/experiments/intpips/generate.py b/experiments/intpips/generate.py
index 7b17d159..495a3709 100644
--- a/experiments/intpips/generate.py
+++ b/experiments/intpips/generate.py
@@ -42,10 +42,8 @@ for tile, pips_srcs_dsts in tiledata.items():
     for pip, src_dst in pipdata.items():
         if pip in pips:
             segmk.addtag(tile, pip, 1)
-        else:
-            src, dst = src_dst
-            if (src not in srcs) and (dst not in dsts):
-                segmk.addtag(tile, pip, 0)
+        elif src_dst[1] not in dsts:
+            segmk.addtag(tile, pip, 0)
 
 segmk.compile()
 segmk.write()