diff --git a/contrib/slapd-modules/nssov/nss-pam-ldapd/tio.c b/contrib/slapd-modules/nssov/nss-pam-ldapd/tio.c
index fcc8f04ac7..012e6808af 100644
--- a/contrib/slapd-modules/nssov/nss-pam-ldapd/tio.c
+++ b/contrib/slapd-modules/nssov/nss-pam-ldapd/tio.c
@@ -184,7 +184,7 @@ static int tio_wait(int fd, short events, int timeout,
       return -1;
     }
     else if ((errno != EINTR) && (errno != EAGAIN))
-      /* some error ocurred */
+      /* some error occurred */
       return -1;
     /* we just try again on EINTR or EAGAIN */
   }
diff --git a/doc/devel/variadic_debug/07-shortcut.cocci b/doc/devel/variadic_debug/07-shortcut.cocci
index ccd7984a98..99b3b556ad 100644
--- a/doc/devel/variadic_debug/07-shortcut.cocci
+++ b/doc/devel/variadic_debug/07-shortcut.cocci
@@ -160,7 +160,7 @@ initializer I;
 )
 }
 
-// the rest identifies and removes a (newly-)reduntant LogTest check
+// the rest identifies and removes a (newly-)redundant LogTest check
 @if_guard@
 position p;
 statement s;
diff --git a/doc/guide/admin/appendix-changes.sdf b/doc/guide/admin/appendix-changes.sdf
index 36ffbe470c..8a2dad3ba3 100644
--- a/doc/guide/admin/appendix-changes.sdf
+++ b/doc/guide/admin/appendix-changes.sdf
@@ -68,7 +68,7 @@ These features were strongly deprecated in 2.4 and removed in 2.5.
 
 H3: back-bdb and back-hdb
 
-back-bdb and back-hdb were signficantly slower than back-mdb and
+back-bdb and back-hdb were significantly slower than back-mdb and
 required significant tuning of multiple parameters to maximize
 performance. back-mdb requires no tuning and provides all the
 functionality previously provided via back-bdb and back-hdb.