diff --git a/WINGs/WINGs/WUtil.h b/WINGs/WINGs/WUtil.h
index 84f60b96..d993e58a 100644
--- a/WINGs/WINGs/WUtil.h
+++ b/WINGs/WINGs/WUtil.h
@@ -220,7 +220,7 @@ char* wstrndup(const char *str, size_t len);
  * str1 and str2 can be any strings including static and constant strings.
  * str1 and str2 will not be modified.
  * Free the returned string when you're done with it. */
-char* wstrconcat(char *str1, char *str2);
+char* wstrconcat(const char *str1, const char *str2);
 
 /* This will append src to dst, and return dst. dst MUST be either NULL
  * or a string that was a result of a dynamic allocation (malloc, realloc
@@ -229,7 +229,7 @@ char* wstrconcat(char *str1, char *str2);
  * it is equivalent to calling wstrdup(src) ).
  * The returned address may be different from the original address of dst,
  * so always assign the returned address to avoid dangling pointers. */
-char* wstrappend(char *dst, char *src);
+char* wstrappend(char *dst, const char *src);
 
 size_t wstrlcpy(char *, const char *, size_t);
 size_t wstrlcat(char *, const char *, size_t);
@@ -815,7 +815,7 @@ Bool WMWritePropListToFile(WMPropList *plist, char *path);
 
 char* wusergnusteppath(void);
 
-char* wdefaultspathfordomain(char *domain);
+char* wdefaultspathfordomain(const char *domain);
 
 char* wglobaldefaultspathfordomain(const char *domain);
 
diff --git a/WINGs/proplist.c b/WINGs/proplist.c
index 1f505466..ee805000 100644
--- a/WINGs/proplist.c
+++ b/WINGs/proplist.c
@@ -502,22 +502,22 @@ static INLINE int getNonSpaceChar(PLData * pldata)
 	return c;
 }
 
-static char *unescapestr(char *src)
+static char *unescapestr(const char *src)
 {
 	char *dest = wmalloc(strlen(src) + 1);
-	char *sPtr, *dPtr;
+	char *dPtr;
 	char ch;
 
-	for (sPtr = src, dPtr = dest; *sPtr; sPtr++, dPtr++) {
-		if (*sPtr != '\\') {
-			*dPtr = *sPtr;
+	for (dPtr = dest; *src; src++, dPtr++) {
+		if (*src != '\\') {
+			*dPtr = *src;
 		} else {
-			ch = *(++sPtr);
+			ch = *(++src);
 			if ((ch >= '0') && (ch <= '3')) {
 				/* assume next 2 chars are octal too */
 				*dPtr = ((ch & 07) << 6);
-				*dPtr |= ((*(++sPtr) & 07) << 3);
-				*dPtr |= *(++sPtr) & 07;
+				*dPtr |= ((*(++src) & 07) << 3);
+				*dPtr |= *(++src) & 07;
 			} else {
 				switch (ch) {
 				case 'a':
@@ -542,7 +542,7 @@ static char *unescapestr(char *src)
 					*dPtr = '\f';
 					break;
 				default:
-					*dPtr = *sPtr;
+					*dPtr = *src;
 				}
 			}
 		}
diff --git a/WINGs/string.c b/WINGs/string.c
index 8da008fc..4db99813 100644
--- a/WINGs/string.c
+++ b/WINGs/string.c
@@ -203,7 +203,7 @@ char *wstrndup(const char *str, size_t len)
 	return copy;
 }
 
-char *wstrconcat(char *str1, char *str2)
+char *wstrconcat(const char *str1, const char *str2)
 {
 	char *str;
 	size_t slen;
@@ -226,7 +226,7 @@ char *wstrconcat(char *str1, char *str2)
 	return str;
 }
 
-char *wstrappend(char *dst, char *src)
+char *wstrappend(char *dst, const char *src)
 {
 	size_t slen;
 
diff --git a/WINGs/userdefaults.c b/WINGs/userdefaults.c
index 6de410e0..96575a03 100644
--- a/WINGs/userdefaults.c
+++ b/WINGs/userdefaults.c
@@ -80,7 +80,7 @@ char *wusergnusteppath()
 	return path;
 }
 
-char *wdefaultspathfordomain(char *domain)
+char *wdefaultspathfordomain(const char *domain)
 {
 	char *path;
 	char *gspath;