diff --git a/lib/libc/yp/xdryp.c b/lib/libc/yp/xdryp.c
index 7aed6ad3af84..ec2f71a1a2aa 100644
--- a/lib/libc/yp/xdryp.c
+++ b/lib/libc/yp/xdryp.c
@@ -42,7 +42,7 @@ extern void *ypresp_data;
  * I'm leaving the xdr_datum() function in purely for backwards
  * compatibility. yplib.c doesn't actually use it, but it's listed
  * in yp_prot.h as being available, so it's probably a good idea to
- * leave it in in case somebody goes looking for it.
+ * leave it in case somebody goes looking for it.
  */
 typedef struct {
 	char *dptr;
diff --git a/lib/libelf/libelf_convert.m4 b/lib/libelf/libelf_convert.m4
index 2dda7424d3d6..15bb6d1e9d7d 100644
--- a/lib/libelf/libelf_convert.m4
+++ b/lib/libelf/libelf_convert.m4
@@ -136,7 +136,7 @@ __FBSDID("$FreeBSD$");
 
 /*
  * Read in various integral values.  The source pointer could be
- * unaligned.  Values are read in in native byte order.  The source
+ * unaligned.  Values are read in native byte order.  The source
  * pointer is incremented appropriately.
  */
 
diff --git a/share/man/man7/security.7 b/share/man/man7/security.7
index 8f422258cb8f..ed24435af82a 100644
--- a/share/man/man7/security.7
+++ b/share/man/man7/security.7
@@ -138,7 +138,7 @@ This gives you a convenient way to detect the attacker.
 Making
 it impossible for an attacker to install a backdoor may actually be detrimental
 to your security because it will not close off the hole the attacker used to
-break in in the first place.
+break in originally.
 .Pp
 Security remedies should always be implemented with a multi-layered
 .Dq onion peel
diff --git a/sys/boot/i386/cdboot/cdboot.s b/sys/boot/i386/cdboot/cdboot.s
index 8115589da68c..7d2a840a921d 100644
--- a/sys/boot/i386/cdboot/cdboot.s
+++ b/sys/boot/i386/cdboot/cdboot.s
@@ -174,7 +174,7 @@ lookup_path:	push %si			# Save file name pointer
 lookup_found:					# Found a loader file
 #
 # Load the binary into the buffer.  Due to real mode addressing limitations
-# we have to read it in in 64k chunks.
+# we have to read it in 64k chunks.
 #
 		mov DIR_SIZE(%bx),%eax		# Read file length
 		add $SECTOR_SIZE-1,%eax		# Convert length to sectors
diff --git a/sys/boot/pc98/cdboot/cdboot.s b/sys/boot/pc98/cdboot/cdboot.s
index 14af0a7f2b45..b6efeef64671 100644
--- a/sys/boot/pc98/cdboot/cdboot.s
+++ b/sys/boot/pc98/cdboot/cdboot.s
@@ -415,7 +415,7 @@ lookup_path:	push %si			# Save file name pointer
 lookup_found:					# Found a loader file
 #
 # Load the binary into the buffer.  Due to real mode addressing limitations
-# we have to read it in in 64k chunks.
+# we have to read it in 64k chunks.
 #
 		mov %es:DIR_SIZE(%bx),%eax	# Read file length
 		add $SECTOR_SIZE-1,%eax		# Convert length to sectors
diff --git a/usr.bin/checknr/checknr.c b/usr.bin/checknr/checknr.c
index 5f0fb1f767c4..e7051066f996 100644
--- a/usr.bin/checknr/checknr.c
+++ b/usr.bin/checknr/checknr.c
@@ -79,7 +79,7 @@ struct stkstr {
 	int opno;	/* number of opening bracket */
 	int pl;		/* '+', '-', ' ' for \s, 1 for \f, 0 for .ft */
 	int parm;	/* parm to size, font, etc */
-	int lno;	/* line number the thing came in in */
+	int lno;	/* line number */
 } stk[MAXSTK];
 int stktop;