diff --git a/reactos/lib/msvcrt/string/memccpy.c b/reactos/lib/msvcrt/string/memccpy.c
index 42fd26b0795..98d712a50b7 100644
--- a/reactos/lib/msvcrt/string/memccpy.c
+++ b/reactos/lib/msvcrt/string/memccpy.c
@@ -4,6 +4,18 @@
 void *
 _memccpy (void *to, const void *from,int c,size_t count)
 {
-	memcpy(to,from,count);
-	return memchr(to,c,count);
+  char t;
+  size_t i;
+  char *dst=(char*)to;
+  const char *src=(const char*)from;
+
+  for ( i = 0; i < count; i++ )
+  {
+    dst[i] = t = src[i];
+    if ( t == '\0' )
+      break;
+    if ( t == c )
+      return &dst[i+1];
+  }
+  return NULL; /* didn't copy c */
 }
diff --git a/reactos/lib/msvcrt/string/strrev.c b/reactos/lib/msvcrt/string/strrev.c
index d36b7a3dee7..fac5a47b1ff 100644
--- a/reactos/lib/msvcrt/string/strrev.c
+++ b/reactos/lib/msvcrt/string/strrev.c
@@ -2,17 +2,18 @@
 
 char * _strrev(char *s)
 {
-	char  *e;
-	char   a;
-	e=s;
+	char a, *b, *e;
+	b=e=s;
 	while (*e)
 		e++;
-	while (s<e) {
-		a=*s;
-		*s=*e;
+	e--; /* start at last char, not NULL char */
+	while ( b < e )
+	{
+		a=*b;
+		*b=*e;
 		*e=a;
-		s++;
+		b++;
 		e--;
 	}
-	return s;
+	return s; /* return ptr to beginning of string */
 }