--- a/util.h
+++ b/util.h
@@ -35,7 +35,7 @@
 int digits(int n, int base);
 char *replace_backslashed(char *string);
 
-char *_strregtok_previous_end;
+extern char *_strregtok_previous_end;
 char *strregtok(char *string, const regex_t *seperator);
 
 #endif /* UTIL_H */
--- a/util.c
+++ b/util.c
@@ -32,6 +32,8 @@
 #include "conf.h"
 #include "util.h"
 
+char *_strregtok_previous_end;
+
 /* replace_backslashed
  *
  * Replaces, within the given string, certain backslashed characters with the