diff --git a/src/pot.sol b/src/pot.sol
index dfdff599..15dd9bd5 100644
--- a/src/pot.sol
+++ b/src/pot.sol
@@ -139,13 +139,18 @@ contract Pot is LibNote {
     // --- Savings Rate Accumulation ---
     function drip() external note returns (uint tmp) {
         require(now >= rho, "Pot/invalid-now");
-        tmp = rmul(rpow(dsr, now - rho, ONE), chi);
+        tmp = drop();
         uint chi_ = sub(tmp, chi);
         chi = tmp;
         rho = now;
         vat.suck(address(vow), address(this), mul(Pie, chi_));
     }
 
+    function drop() external view returns (uint) {
+        if (now == rho) return chi;
+        return rmul(rpow(dsr, now - rho, ONE), chi);
+    }
+
     // --- Savings Dai Management ---
     function join(uint wad) external note {
         require(now == rho, "Pot/rho-not-updated");