diff --git a/src/oui.c b/src/oui.c
index 945d812..cc9e07d 100644
--- a/src/oui.c
+++ b/src/oui.c
@@ -44,7 +44,7 @@
 #define OUIFILE "/usr/share/hwdata/oui.txt"
 #endif
 
-char *ouitocomp(const char *oui)
+static char *ouitocomp(const char *oui)
 {
 	struct stat st;
 	char *str, *map, *off, *end;
diff --git a/src/oui.h b/src/oui.h
index 8dd8879..2ddc27f 100644
--- a/src/oui.h
+++ b/src/oui.h
@@ -21,5 +21,4 @@
  *
  */
 
-char *ouitocomp(const char *oui);
 char *batocomp(const bdaddr_t *ba);