diff --git a/extra/math/analysis/analysis.factor b/extra/math/analysis/analysis.factor
old mode 100644
new mode 100755
index a41281d779..0b4b14ce54
--- a/extra/math/analysis/analysis.factor
+++ b/extra/math/analysis/analysis.factor
@@ -1,5 +1,5 @@
 USING: kernel math math.constants math.functions math.intervals
-math.vectors namespaces sequences ;
+math.vectors namespaces sequences combinators.cleave ;
 IN: math.analysis
 
 <PRIVATE