diff -r 32bd7ef40897 -r 9ceda59abd27 lib/iec_types.h
--- a/lib/iec_types.h	Tue Aug 12 16:14:12 2008 +0200
+++ b/lib/iec_types.h	Tue Aug 19 18:03:11 2008 +0200
@@ -1,3 +1,6 @@
+#ifndef IEC_TYPES_H
+#define IEC_TYPES_H
+
 #include <limits.h>
 #include <float.h>
 #include <time.h>
@@ -51,3 +54,4 @@
     uint8_t body[STR_MAX_LEN];
 } IEC_STRING;
 
+#endif /*IEC_TYPES_H*/