diff --git a/BasiliskII/src/slirp/slirp.h b/BasiliskII/src/slirp/slirp.h
index 04548cea..8c6803a8 100644
--- a/BasiliskII/src/slirp/slirp.h
+++ b/BasiliskII/src/slirp/slirp.h
@@ -288,8 +288,8 @@ extern int do_echo;
 # define insque_32 insque
 # define remque_32 remque
 #else
- inline void insque_32 _P((void *, void *));
- inline void remque_32 _P((void *));
+ extern inline void insque_32 _P((void *, void *));
+ extern inline void remque_32 _P((void *));
 #endif
 
 #ifndef _WIN32