--- ccontrol-1.0.orig/extensions.gperf
+++ ccontrol-1.0/extensions.gperf
@@ -3,7 +3,7 @@
    by Martin Pool */
 /* Keep -Wmissing-declarations happy: */
 const char *
-find_extension (register const char *str, register unsigned int len);
+find_extension (register const char *str, register size_t len);
 %}
 %language=ANSI-C
 %define hash-function-name hash_extension
--- ccontrol-1.0.orig/keywords.gperf
+++ ccontrol-1.0/keywords.gperf
@@ -1,7 +1,7 @@
 %{
 /* Keep -Wmissing-declarations happy: */
 const struct ccontrol_command *
-find_keyword (register const char *str, register unsigned int len);
+find_keyword (register const char *str, register size_t len);
 %}
 %language=ANSI-C
 struct ccontrol_command {
