diff --git a/tools/fileadder.c b/tools/fileadder.c
index 89bbd73..eff98b7 100644
--- a/tools/fileadder.c
+++ b/tools/fileadder.c
@@ -261,11 +261,12 @@ int main(int argc, char **argv)
 
 	// Add preambles to index and header file
 	defbuf_p = ibuf_p = xbuf_p = fbuf_p = 0;
-	defbuf_p += snprintf(&dbuf[defbuf_p], DEF_SIZE - defbuf_p, "#ifndef FDATA_DEFS_H\n\n");
+	defbuf_p += snprintf(&dbuf[defbuf_p], DEF_SIZE - defbuf_p, "// This file is automatically generated, do not edit!\n\n");
+	defbuf_p += snprintf(&dbuf[defbuf_p], DEF_SIZE - defbuf_p, "#ifndef FDATA_DEFS_H\n");
 	defbuf_p += snprintf(&dbuf[defbuf_p], DEF_SIZE - defbuf_p, "#define FDATA_DEFS_H\n\n");
 	defbuf_p += snprintf(&dbuf[defbuf_p], DEF_SIZE - defbuf_p, "#include <stdint.h>\n\n");
 	defbuf_p += snprintf(&dbuf[defbuf_p], DEF_SIZE - defbuf_p, "struct f_data {\n  __code char *file;\n  uint32_t start;\n  uint16_t len;\n  __code char *mime;\n};\n\n");
-	defbuf_p += snprintf(&dbuf[defbuf_p], DEF_SIZE - defbuf_p, "typedef uint16_t (*fcall_ptr)(void);\n\n");
+	defbuf_p += snprintf(&dbuf[defbuf_p], DEF_SIZE - defbuf_p, "typedef uint16_t (* fcall_ptr)(void);\n\n");
 
 	ibuf_p += snprintf(&ibuf[ibuf_p], INDEX_SIZE - ibuf_p, "// This file is automatically generated, do not edit!\n\n");
 	if (arguments.prefix)