diff --git a/sys/sys/syslimits.h b/sys/sys/syslimits.h
index dfe8897c2613..974e17393a74 100644
--- a/sys/sys/syslimits.h
+++ b/sys/sys/syslimits.h
@@ -43,7 +43,11 @@
  * Do not add any new variables here.  (See the comment at the end of
  * the file for why.)
  */
+#if defined(__arm__) || defined(__powerpc__)
 #define	ARG_MAX			65536	/* max bytes for an exec function */
+#else
+#define	ARG_MAX			262144	/* max bytes for an exec function */
+#endif
 #ifndef CHILD_MAX
 #define	CHILD_MAX		   40	/* max simultaneous processes */
 #endif