diff --git a/man5/proc.5 b/man5/proc.5
index 4581e6ca6..3e568c08d 100644
--- a/man5/proc.5
+++ b/man5/proc.5
@@ -1039,8 +1039,9 @@ same process.
 .TP
 .I /proc/slabinfo
 Information about kernel caches.
-Since Linux 2.6.16 this file is only present if the CONFIG_SLAB kernel
-configuration option is enabled.
+Since Linux 2.6.16 this file is only present if the
+.B CONFIG_SLAB
+kernel configuration option is enabled.
 The columns in
 .I /proc/slabinfo
 are:
@@ -1499,7 +1500,8 @@ This file contains the path for the kernel module loader.
 The default value is
 .IR /sbin/modprobe .
 The file is only present if the kernel is built with the
-CONFIG_KMOD option enabled.
+.B CONFIG_KMOD
+option enabled.
 It is described by the kernel source file
 .I Documentation/kmod.txt
 (only present in kernel 2.4 and earlier).