diff --git a/example/capacitor_time_curve.cpp b/example/capacitor_time_curve.cpp
index 5d41e054..c604d6e5 100644
--- a/example/capacitor_time_curve.cpp
+++ b/example/capacitor_time_curve.cpp
@@ -33,32 +33,31 @@
 int main()
 {
   using namespace units::isq;
-  using namespace units::isq::si;
   using namespace units::isq::si::references;
 
   std::cout << "mp-units capacitor time curve example...\n";
   std::cout.setf(std::ios_base::fixed, std::ios_base::floatfield);
   std::cout.precision(3);
 
-  constexpr auto C = 0.47 * uF;
-  constexpr auto V0 = 5.0 * V;
-  constexpr auto R = 4.7 * kR;
+  constexpr auto c = 0.47 * uF;
+  constexpr auto v0 = 5.0 * V;
+  constexpr auto r = 4.7 * kR;
 
-  for (auto t = 0 * ms; t <= 50 * ms; ++t) {
-    const Voltage auto Vt = V0 * units::exp(-t / (R * C));
+  for (auto tt = 0 * ms; tt <= 50 * ms; ++tt) {
+    const Voltage auto vt = v0 * units::exp(-tt / (r * c));
 
-    std::cout << "at " << t << " voltage is ";
+    std::cout << "at " << tt << " voltage is ";
 
-    if (Vt >= 1 * V)
-      std::cout << Vt;
-    else if (Vt >= 1 * mV)
-      std::cout << quantity_cast<millivolt>(Vt);
-    else if (Vt >= 1 * uV)
-      std::cout << quantity_cast<microvolt>(Vt);
-    else if (Vt >= 1 * nV)
-      std::cout << quantity_cast<nanovolt>(Vt);
+    if (vt >= 1 * V)
+      std::cout << vt;
+    else if (vt >= 1 * mV)
+      std::cout << quantity_cast<si::millivolt>(vt);
+    else if (vt >= 1 * uV)
+      std::cout << quantity_cast<si::microvolt>(vt);
+    else if (vt >= 1 * nV)
+      std::cout << quantity_cast<si::nanovolt>(vt);
     else
-      std::cout << quantity_cast<picovolt>(Vt);
+      std::cout << quantity_cast<si::picovolt>(vt);
     std::cout << "\n";
   }
 }