diff -Naurp src/build.c src/build.c
--- src/build.c	2003-03-05 11:43:59.000000000 +0100
+++ src/build.c	2004-11-17 15:01:01.000000000 +0100
@@ -333,7 +333,7 @@ build(void)
 		(void) fprintf(stderr, "cscope: cannot open file %s\n", reffile);
 		myexit(1);
 	}
-	if (invertedindex == YES && (postings = myfopen(temp1, "wb")) == NULL) {
+	if (invertedindex == YES && (postings = myfopen(temp1, "w+xb")) == NULL) {
 		cannotwrite(temp1);
 		cannotindex();
 	}
diff -Naurp src_old/display.c src/display.c
--- src/display.c	2003-09-04 17:54:02.000000000 +0200
+++ src/display.c	2004-11-17 15:01:01.000000000 +0100
@@ -754,13 +754,13 @@ BOOL
 writerefsfound(void)
 {
 	if (refsfound == NULL) {
-		if ((refsfound = myfopen(temp1, "wb")) == NULL) {
+		if ((refsfound = myfopen(temp1, "w+xb")) == NULL) {
 			cannotopen(temp1);
 			return(NO);
 		}
 	} else {
 		(void) fclose(refsfound);
-		if ( (refsfound = myfopen(temp1, "wb")) == NULL) {
+		if ( (refsfound = myfopen(temp1, "w+xb")) == NULL) {
 			postmsg("Cannot reopen temporary file");
 			return(NO);
 		}