diff --git a/src/test_libFLAC++/metadata_manip.cpp b/src/test_libFLAC++/metadata_manip.cpp
index 7720d4d2..fccf0d21 100644
--- a/src/test_libFLAC++/metadata_manip.cpp
+++ b/src/test_libFLAC++/metadata_manip.cpp
@@ -189,7 +189,7 @@ bool open_tempfile_(const char *filename, FILE **tempfile, char **tempfilename)
 	strcpy(*tempfilename, filename);
 	strcat(*tempfilename, tempfile_suffix);
 
-	if(0 == (*tempfile = fopen(*tempfilename, "w+b")))
+	if(0 == (*tempfile = fopen(*tempfilename, "wb")))
 		return false;
 
 	return true;
diff --git a/src/test_libFLAC/metadata_manip.c b/src/test_libFLAC/metadata_manip.c
index 540c3e6e..d8e73d93 100644
--- a/src/test_libFLAC/metadata_manip.c
+++ b/src/test_libFLAC/metadata_manip.c
@@ -172,7 +172,7 @@ FLAC__bool open_tempfile_(const char *filename, FILE **tempfile, char **tempfile
 	strcpy(*tempfilename, filename);
 	strcat(*tempfilename, tempfile_suffix);
 
-	if(0 == (*tempfile = fopen(*tempfilename, "w+b")))
+	if(0 == (*tempfile = fopen(*tempfilename, "wb")))
 		return false;
 
 	return true;