diff --git a/boot/bootutil/src/bootutil_misc.c b/boot/bootutil/src/bootutil_misc.c
index 4bf662f..4a2ab9a 100644
--- a/boot/bootutil/src/bootutil_misc.c
+++ b/boot/bootutil/src/bootutil_misc.c
@@ -310,7 +310,7 @@
  * This functions tries to locate the status area after an aborted swap,
  * by looking for the magic in the possible locations.
  *
- * If the magic is sucessfully found, a flash_area * is returned and it
+ * If the magic is successfully found, a flash_area * is returned and it
  * is the responsibility of the called to close it.
  *
  * @returns 0 on success, -1 on errors
diff --git a/boot/bootutil/src/image_rsa.c b/boot/bootutil/src/image_rsa.c
index 53a4591..3e21a6d 100644
--- a/boot/bootutil/src/image_rsa.c
+++ b/boot/bootutil/src/image_rsa.c
@@ -191,7 +191,7 @@
      * The salt length is not known at this point.
      */
 
-    /* Step 4.  If the rightmost octect of EM does have the value
+    /* Step 4.  If the rightmost octet of EM does have the value
      * 0xbc, output inconsistent and stop.
      */
     if (em[PSS_EMLEN - 1] != 0xbc) {
diff --git a/boot/bootutil/src/loader.c b/boot/bootutil/src/loader.c
index 3ee6335..5e12891 100644
--- a/boot/bootutil/src/loader.c
+++ b/boot/bootutil/src/loader.c
@@ -383,7 +383,7 @@
 }
 
 /*
- * Slots are compatible when all sectors that store upto to size of the image
+ * Slots are compatible when all sectors that store up to to size of the image
  * round up to sector size, in both slot's are able to fit in the scratch
  * area, and have sizes that are a multiple of each other (powers of two
  * presumably!).
@@ -915,7 +915,7 @@
  * Check that there is a valid image in a slot
  *
  * @returns
- *         0 if image was succesfully validated
+ *         0 if image was successfully validated
  *         1 if no bootloable image was found
  *         -1 on any errors
  */
diff --git a/boot/bootutil/src/tlv.c b/boot/bootutil/src/tlv.c
index 9108be4..bf6aebd 100644
--- a/boot/bootutil/src/tlv.c
+++ b/boot/bootutil/src/tlv.c
@@ -29,7 +29,7 @@
  * @param type Type of TLV to look for
  * @param prot true if TLV has to be stored in the protected area, false otherwise
  *
- * @returns 0 if the TLV iterator was succesfully started
+ * @returns 0 if the TLV iterator was successfully started
  *          -1 on errors
  */
 int