diff --git a/doc/ncdu.pod b/doc/ncdu.pod
index 74758218d0466e3b4896ae42be53a402144d5f5b..3783d3c6ce1ee79ff994d78de093e84f0dcd2bd5 100644
--- a/doc/ncdu.pod
+++ b/doc/ncdu.pod
@@ -273,11 +273,11 @@ flags have the following meaning:
 
 =item !
 
-An error occured while reading this directory.
+An error occurred while reading this directory.
 
 =item .
 
-An error occured while reading a subdirectory, so the indicated size may not be
+An error occurred while reading a subdirectory, so the indicated size may not be
 correct.
 
 =item <
@@ -286,7 +286,7 @@ File or directory is excluded from the statistics by using exlude patterns.
 
 =item >
 
-Directory is on an other filesystem.
+Directory is on another filesystem.
 
 =item @
 
diff --git a/src/delete.c b/src/delete.c
index 82e5e9957bd1a196258e986ca9a4960ade606544..4f93a1847127bc16059e02a0370e413ae4ad4621 100644
--- a/src/delete.c
+++ b/src/delete.c
@@ -195,7 +195,7 @@ static int delete_dir(struct dir *dr) {
     r = unlink(dr->name);
 
 delete_nxt:
-  /* error occured, ask user what to do */
+  /* error occurred, ask user what to do */
   if(r == -1 && !ignoreerr) {
     state = DS_FAILED;
     lasterrno = errno;
diff --git a/src/dir.h b/src/dir.h
index 3be4a1cb828294bdd99a156afe96e590935f7593..b7e43d1abec2eebd52505f322ddb3504df7abcfe 100644
--- a/src/dir.h
+++ b/src/dir.h
@@ -123,7 +123,7 @@ void dir_curpath_set(const char *);
 void dir_curpath_enter(const char *);
 void dir_curpath_leave();
 
-/* Sets the path where the last error occured, or reset on NULL. */
+/* Sets the path where the last error occurred, or reset on NULL. */
 void dir_setlasterr(const char *);
 
 /* Error message on fatal error, or NULL if there hasn't been a fatal error yet. */
diff --git a/src/dir_common.c b/src/dir_common.c
index 5eb2a20e82b345120caab5440477210c606df7e9..508205117f0db242e3ca059bd135672952df6d32 100644
--- a/src/dir_common.c
+++ b/src/dir_common.c
@@ -36,7 +36,7 @@ struct dir_output dir_output;
 char *dir_fatalerr; /* Error message on a fatal error. (NULL if there was no fatal error) */
 int dir_ui;         /* User interface to use */
 static int confirm_quit_while_scanning_stage_1_passed; /* Additional check before quitting */
-static char *lasterr; /* Path where the last error occured. */
+static char *lasterr; /* Path where the last error occurred. */
 static int curpathl; /* Allocated length of dir_curpath */
 static int lasterrl; /* ^ of lasterr */
 
diff --git a/src/dir_import.c b/src/dir_import.c
index a9d1b2279a030133f0c69723de0ee57dc56d2a94..b523849377c74df2ddace35383da26a9e76a82b7 100644
--- a/src/dir_import.c
+++ b/src/dir_import.c
@@ -81,7 +81,7 @@ struct ctx {
 
 /* Fills readbuf with data from the stream. *buf will have at least n (<
  * READ_BUF_SIZE) bytes available, unless the stream reached EOF or an error
- * occured. If the file data contains a null-type, this is considered an error.
+ * occurred. If the file data contains a null-type, this is considered an error.
  * Returns 0 on success, non-zero on error. */
 static int fill(int n) {
   int r;
diff --git a/src/dir_scan.c b/src/dir_scan.c
index 2b0f85e59df8fa4da40175c928b4c836455fdb70..f226114365f1b0514901dda0222651566ccce401 100644
--- a/src/dir_scan.c
+++ b/src/dir_scan.c
@@ -84,7 +84,7 @@ static void stat_to_dir(struct stat *fs) {
 /* Reads all filenames in the currently chdir'ed directory and stores it as a
  * nul-separated list of filenames. The list ends with an empty filename (i.e.
  * two nuls). . and .. are not included. Returned memory should be freed. *err
- * is set to 1 if some error occured. Returns NULL if that error was fatal.
+ * is set to 1 if some error occurred. Returns NULL if that error was fatal.
  * The reason for reading everything in memory first and then walking through
  * the list is to avoid eating too many file descriptors in a deeply recursive
  * directory. */
diff --git a/src/dirlist.c b/src/dirlist.c
index 5cfe52a4b8d7c42e6fe336500806036c9f494330..3b4c655755e5f7eab035a8bf9ea6c698fb388665 100644
--- a/src/dirlist.c
+++ b/src/dirlist.c
@@ -306,7 +306,7 @@ void dirlist_select(struct dir *d) {
  *  1 = selected has moved down
  * -1 = selected has moved up
  * -2 = selected = first item in the list (faster version of '1')
- * -3 = top should be considered as invalid (after sorting or opening an other dir)
+ * -3 = top should be considered as invalid (after sorting or opening another dir)
  * -4 = an item has been deleted
  * -5 = hidden flag has been changed
  *
diff --git a/src/global.h b/src/global.h
index 33865eab78345db6be5f07b128e67f115e744b63..effd86f0538356588c112b1e3e02546384efef9e 100644
--- a/src/global.h
+++ b/src/global.h
@@ -45,7 +45,7 @@
 #define FF_DIR    0x01
 #define FF_FILE   0x02
 #define FF_ERR    0x04 /* error while reading this item */
-#define FF_OTHFS  0x08 /* excluded because it was an other filesystem */
+#define FF_OTHFS  0x08 /* excluded because it was another filesystem */
 #define FF_EXL    0x10 /* excluded using exlude patterns */
 #define FF_SERR   0x20 /* error in subdirectory */
 #define FF_HLNKC  0x40 /* hard link candidate (file with st_nlink > 1) */
diff --git a/src/help.c b/src/help.c
index ab6697a432ce12c085ae96c785959ac62522b7b7..1c46b0f381712aca2aa3eb2309e58749364a3c8a 100644
--- a/src/help.c
+++ b/src/help.c
@@ -97,10 +97,10 @@ void help_draw() {
       ncaddch(10, 4, 'H');
       ncaddch(11, 4, 'e');
       uic_set(UIC_DEFAULT);
-      ncaddstr( 5, 7, "An error occured while reading this directory");
-      ncaddstr( 6, 7, "An error occured while reading a subdirectory");
+      ncaddstr( 5, 7, "An error occurred while reading this directory");
+      ncaddstr( 6, 7, "An error occurred while reading a subdirectory");
       ncaddstr( 7, 7, "File or directory is excluded from the statistics");
-      ncaddstr( 8, 7, "Directory was on an other filesystem");
+      ncaddstr( 8, 7, "Directory was on another filesystem");
       ncaddstr( 9, 7, "This is not a file nor a dir (symlink, socket, ...)");
       ncaddstr(10, 7, "Same file was already counted (hard link)");
       ncaddstr(11, 7, "Empty directory");