diff --git a/src/capwap/cw_save_file.c b/src/capwap/cw_save_file.c
new file mode 100644
index 00000000..bc8523c1
--- /dev/null
+++ b/src/capwap/cw_save_file.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+#include "file.h"
+
+
+int cw_save_file(const char *filename, char *data, int len)
+{
+	FILE *outfile = fopen(filename, "wb");
+	if (!outfile)
+		return 0;
+
+	int bytes = fwrite(data, 1, len, outfile);
+	fclose(outfile);
+	return bytes;
+}