diff --git a/src/VisVim/DSAddIn.cpp b/src/VisVim/DSAddIn.cpp
index 3e72544..b16361b 100644
--- a/src/VisVim/DSAddIn.cpp
+++ b/src/VisVim/DSAddIn.cpp
@@ -93,7 +93,7 @@
 
 // Add a command to DevStudio
 // Creates a toolbar button for the command also.
-// 'MethodName' is the name of the methode specified in the .odl file
+// 'MethodName' is the name of the method specified in the .odl file
 // 'StrResId' the resource id of the descriptive string
 // 'GlyphIndex' the image index into the command buttons bitmap
 // Return true on success
diff --git a/src/feature.h b/src/feature.h
index 00dd014..aa694e6 100644
--- a/src/feature.h
+++ b/src/feature.h
@@ -1096,7 +1096,7 @@
 /*
  * +termresponse	send t_RV to obtain terminal response.  Used for xterm
  *			to check if mouse dragging can be used and if term
- *			codes can be obtaind.
+ *			codes can be obtained.
  */
 #if (defined(FEAT_NORMAL) || defined(FEAT_MOUSE)) && defined(HAVE_TGETENT)
 # define FEAT_TERMRESPONSE
@@ -1155,7 +1155,7 @@
  * +python		Python interface: "--enable-pythoninterp"
  * +tcl			TCL interface: "--enable-tclinterp"
  * +sniff		Sniff interface: "--enable-sniff"
- * +sun_workshop	Sun Workshop integegration
+ * +sun_workshop	Sun Workshop integration
  * +netbeans_intg	Netbeans integration
  */
 
diff --git a/src/os_unix.c b/src/os_unix.c
index beeea3f..2d512b7 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -490,7 +490,7 @@
 	    /* avoid overflow as much as possible */
 	    while (shiftright > 0 && (pagesize & 1) == 0)
 	    {
-		pagesize = pagesize >> 1;
+		pagesize = (long_u)pagesize >> 1;
 		--shiftright;
 	    }
 	    mem = (long_u)pagesize * pagecount;
diff --git a/src/os_unix.h b/src/os_unix.h
index 821462c..d99d1c8 100644
--- a/src/os_unix.h
+++ b/src/os_unix.h
@@ -483,7 +483,7 @@
 # endif
 # ifndef VMS
 #  ifdef __MVS__
-  /* on OS390 Unix getenv() doesn't return a pointer to persistant
+  /* on OS390 Unix getenv() doesn't return a pointer to persistent
    * storage -> use __getenv() */
 #   define mch_getenv(x) (char_u *)__getenv((char *)(x))
 #  else
diff --git a/src/tag.c b/src/tag.c
index aa1ab75..d46239c 100644
--- a/src/tag.c
+++ b/src/tag.c
@@ -383,7 +383,7 @@
 			/*
 			 * Beyond the last one, just give an error message and
 			 * go to the last one.  Don't store the cursor
-			 * postition.
+			 * position.
 			 */
 			tagstackidx = tagstacklen - 1;
 			EMSG(_(topmsg));
@@ -1330,7 +1330,7 @@
     } incstack[INCSTACK_SIZE];
 
     int		incstack_idx = 0;	/* index in incstack */
-    char_u     *ebuf;			/* aditional buffer for etag fname */
+    char_u     *ebuf;			/* additional buffer for etag fname */
     int		is_etag;		/* current file is emaces style */
 #endif
 
@@ -2812,7 +2812,7 @@
  *
  * Static tags produced by the older ctags program have the format:
  *	'file:tag  file  /pattern'.
- * This is only recognized when both occurences of 'file' are the same, to
+ * This is only recognized when both occurrence of 'file' are the same, to
  * avoid recognizing "string::string" or ":exit".
  *
  * Static tags produced by the new ctags program have the format: