diff --git a/docs/libcurl/libcurl-tutorial.3 b/docs/libcurl/libcurl-tutorial.3
index 7bbdc8a4af39c019c76497967769d29f818cde5c..9b2cb043cffb175aa692ceced2c3414380f871d0 100644
--- a/docs/libcurl/libcurl-tutorial.3
+++ b/docs/libcurl/libcurl-tutorial.3
@@ -754,7 +754,7 @@ to another language and execute that.
 
 - Read the Javascript code and rewrite the same logic in another language.
 
-- Implement a Javascript interpreted, people have successfully used the
+- Implement a Javascript interpreter; people have successfully used the
 Mozilla Javascript engine in the past.
 
 - Ask your admins to stop this, for a static proxy setup or similar.
diff --git a/include/curl/curl.h b/include/curl/curl.h
index 9c8cd40e09b75d5d8ab563338923788348a07395..2e164d923ea55bfbcc52df8f7ca0db475cdd8c86 100644
--- a/include/curl/curl.h
+++ b/include/curl/curl.h
@@ -186,7 +186,7 @@ typedef size_t (*curl_write_callback)(char *buffer,
                                       size_t nitems,
                                       void *outstream);
 
-/* this is the return codes for the seek callbacks */
+/* These are the return codes for the seek callbacks */
 #define CURL_SEEKFUNC_OK       0
 #define CURL_SEEKFUNC_FAIL     1 /* fail the entire transfer */
 #define CURL_SEEKFUNC_CANTSEEK 2 /* tell libcurl seeking can't be done, so
@@ -1516,7 +1516,7 @@ CURL_EXTERN void curl_free(void *p);
  * DESCRIPTION
  *
  * curl_global_init() should be invoked exactly once for each application that
- * uses libcurl and before any call of other libcurl function.
+ * uses libcurl and before any call of other libcurl functions.
  *
  * This function is not thread-safe!
  */
diff --git a/lib/nss.c b/lib/nss.c
index 509a311ec2ab45e6d667e8beb82452c217c3a372..3bfaf7109860271ff076d118e4cfc39f2e6f0979 100644
--- a/lib/nss.c
+++ b/lib/nss.c
@@ -157,7 +157,7 @@ static const cipher_s cipherlist[] = {
 #endif
 };
 
-/* following ciphers are new in NSS 3.4 and not enabled by default, therefor
+/* following ciphers are new in NSS 3.4 and not enabled by default, therefore
    they are enabled explicitly */
 static const int enable_ciphers_by_default[] = {
   TLS_DHE_DSS_WITH_AES_128_CBC_SHA,