diff --git a/lib/roken/roken.h.in b/lib/roken/roken.h.in
index 866aad7b4..86862bcb2 100644
--- a/lib/roken/roken.h.in
+++ b/lib/roken/roken.h.in
@@ -369,7 +369,7 @@ unsigned int bswap32(unsigned int);
 #endif
 
 #ifndef HAVE_BSWAP16
-unsiged short bswap16(unsigned short);
+unsigned short bswap16(unsigned short);
 #endif
 
 #ifndef HAVE_FLOCK