diff --git a/unit.cpp b/unit.cpp
index a7249082..764a27d0 100644
--- a/unit.cpp
+++ b/unit.cpp
@@ -2045,7 +2045,7 @@ int Unit::Taxers(int numtaxers)
 			taxers += numMounts;
 		}
 		else if (Globals->WHO_CAN_TAX & GameDefs::TAX_HORSE_AND_RIDING_SKILL) {
-			weapontax += numMounts;
+			weapontax += numUsableMounts;
 			taxers += numUsableMounts;
 		}