diff --git a/common/fc_types.h b/common/fc_types.h
index 663a7d4975..adfbbefcfb 100644
--- a/common/fc_types.h
+++ b/common/fc_types.h
@@ -31,7 +31,7 @@
 // e.g. unit_types. Used in the network protocol.
 #define MAX_NUM_ITEMS 200
 #define MAX_NUM_ADVANCES 250     // Used in the network protocol.
-#define MAX_NUM_UNITS 250        // Used in the network protocol.
+#define MAX_NUM_UNIT_TYPES 250   // Used in the network protocol.
 #define MAX_NUM_BUILDINGS 200    // Used in the network protocol.
 #define MAX_NUM_TECH_LIST 10     // Used in the network protocol.
 #define MAX_NUM_UNIT_LIST 10     // Used in the network protocol.
diff --git a/common/unittype.h b/common/unittype.h
index 956243a09b..e7459f3d61 100644
--- a/common/unittype.h
+++ b/common/unittype.h
@@ -28,7 +28,7 @@ struct ai_type;
  * it can also be used for fixed allocations to ensure able
  * to hold full number of unit types.
  * Used in the network protocol. */
-#define U_LAST MAX_NUM_UNITS
+#define U_LAST MAX_NUM_UNIT_TYPES
 
 /* The largest distance a ruleset can allow a unit to paradrop.
  *