diff --git a/main/rfc1867.c b/main/rfc1867.c
index 3c1a21c82e1..e67973d15d2 100644
--- a/main/rfc1867.c
+++ b/main/rfc1867.c
@@ -139,7 +139,7 @@ static void normalize_protected_variable(char *varname TSRMLS_DC)
 	
 	/* and remove it */
 	if (s != varname) {
-		memcpy(varname, s, strlen(s)+1);
+		memmove(varname, s, strlen(s)+1);
 	}
 
 	for (p=varname; *p && *p != '['; p++) {
@@ -170,7 +170,7 @@ static void normalize_protected_variable(char *varname TSRMLS_DC)
 		indexend = indexend ? indexend + 1 : index + strlen(index);
 		
 		if (s != index) {
-			memcpy(s, index, strlen(s)+1);
+			memmove(s, index, strlen(index)+1);
 			s += indexend-index;
 		} else {
 			s = indexend;