diff --git a/compiler-init/sc.h b/compiler-init/sc.h
index d455c4e1..612a9911 100644
--- a/compiler-init/sc.h
+++ b/compiler-init/sc.h
@@ -51,7 +51,7 @@
 #define sCHARBITS   8       /* size of a packed character */
 
 #define sDIMEN_MAX     4    /* maximum number of array dimensions */
-#define sLINEMAX     1024   /* input line length (in characters) */
+#define sLINEMAX     1023   /* input line length (in characters) */
 #define sCOMP_STACK   32    /* maximum nesting of #if .. #endif sections */
 #define sDEF_LITMAX  500    /* initial size of the literal pool, in "cells" */
 #define sDEF_AMXSTACK 4096  /* default stack size for AMX files */