diff --git a/src/utilities.h b/src/utilities.h
index 564a7b11c..43a95c4e0 100644
--- a/src/utilities.h
+++ b/src/utilities.h
@@ -55,9 +55,9 @@ static const std::map<std::string, std::map<std::string, double>> standardUnitsL
     {"ampere", {{"ampere", 1.0}}},
     {"becquerel", {{"second", -1.0}}},
     {"candela", {{"candela", 1.0}}},
-    {"coulomb", {{"ampere", -1.0}, {"second", 1.0}}},
+    {"coulomb", {{"ampere", 1.0}, {"second", 1.0}}},
     {"dimensionless", {{"dimensionless", 1.0}}},
-    {"farad", {{"ampere", 2.0}, {"kilogram", -1.0}, {"metre", -2.0}, {"second", -4.0}}},
+    {"farad", {{"ampere", 2.0}, {"kilogram", -1.0}, {"metre", -2.0}, {"second", 4.0}}},
     {"gram", {{"kilogram", 1.0}}},
     {"gray", {{"metre", 2.0}, {"second", -2.0}}},
     {"henry", {{"ampere", -2.0}, {"kilogram", 1.0}, {"metre", 2.0}, {"second", -2.0}}},