diff --git a/amxmodx/format.cpp b/amxmodx/format.cpp
index 568d1dde..8b8edc5d 100644
--- a/amxmodx/format.cpp
+++ b/amxmodx/format.cpp
@@ -374,7 +374,7 @@ reswitch:
 				const char *def = translate(amx, addr, key);
 				size_t written = atcprintf(buf_p, llen, def, amx, params, &arg);
 				buf_p += written;
-				maxlen -= written;
+				llen -= written;
 				break;
 			}
 		case '%':