diff --git a/SheepShaver/src/Unix/sysdeps.h b/SheepShaver/src/Unix/sysdeps.h
index 517cb234..194455a7 100644
--- a/SheepShaver/src/Unix/sysdeps.h
+++ b/SheepShaver/src/Unix/sysdeps.h
@@ -360,7 +360,7 @@ typedef struct timeval tm_time_t;
 extern uint64 GetTicks_usec(void);
 extern void Delay_usec(uint32 usec);
 
-#ifdef HAVE_PTHREADS
+#if defined(HAVE_PTHREADS) || (defined(__linux__) && defined(__powerpc__))
 // Setup pthread attributes
 extern void Set_pthread_attr(pthread_attr_t *attr, int priority);
 #endif