diff --git a/server/src/cryp.rs b/server/src/cryp.rs
index c58d5276..ce2b60b2 100644
--- a/server/src/cryp.rs
+++ b/server/src/cryp.rs
@@ -811,7 +811,7 @@ pub fn cryp_recover(cryp_bytes: Vec<u8>, tx: &mut Transaction) -> Result<Cryp, E
 #[cfg(test)]
 mod tests {
   use cryp::*;
-  use spec::IntPct;
+  use util::IntPct;
 
     #[test]
     fn create_cryp_test() {
diff --git a/server/src/spec.rs b/server/src/spec.rs
index 2f82fd25..2275c405 100644
--- a/server/src/spec.rs
+++ b/server/src/spec.rs
@@ -1,4 +1,5 @@
 use cryp::{Stat, Colours};
+use util::{IntPct};
 
 #[derive(Debug,Copy,Clone,Serialize,Deserialize,PartialEq,PartialOrd,Ord,Eq)]
 pub enum Spec {
@@ -28,16 +29,6 @@ pub enum Spec {
     RBDI,
 }
 
-pub trait IntPct {
-    fn pct(self, pct: u64) -> u64;
-}
-
-impl IntPct for u64 {
-    fn pct(self, pct: u64) -> u64 {
-        self * pct / 100
-    }
-}
-
 impl Spec {
     pub fn affects(&self) -> Vec<Stat> {
         match *self {
diff --git a/server/src/util.rs b/server/src/util.rs
index f278ae2c..ae1d3062 100644
--- a/server/src/util.rs
+++ b/server/src/util.rs
@@ -18,4 +18,27 @@ pub fn startup(db: Db) -> Result<(), Error> {
         },
         Err(e) => Err(format_err!("failed to commit startup tx {:?}", e)),
     }
+}
+
+pub trait IntPct {
+    fn pct(self, pct: u64) -> u64;
+}
+
+impl IntPct for u64 {
+    fn pct(self, pct: u64) -> u64 {
+        self * pct / 100
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn int_pct_test() {
+        assert_eq!(100.pct(110), 110);
+        assert_eq!(100.pct(50), 50);
+        assert_eq!(1.pct(200), 2);
+        assert_eq!(1.pct(50), 0);
+    }
 }
\ No newline at end of file