diff --git a/mjit_worker.c b/mjit_worker.c
index 63f0d64981..cebb9ce4f6 100644
--- a/mjit_worker.c
+++ b/mjit_worker.c
@@ -266,11 +266,7 @@ static char *libruby_pathflag;
 #if defined(__GNUC__) && \
      (!defined(__clang__) || \
       (defined(__clang__) && (defined(__FreeBSD__) || defined(__GLIBC__))))
-# ifdef __sun
-#  define GCC_PIC_FLAGS "-Winvalid-pch", "-fPIC", "-shared", "-w", "-pipe",
-# else
-#  define GCC_PIC_FLAGS "-Wfatal-errors", "-fPIC", "-shared", "-w", "-pipe",
-# endif
+# define GCC_PIC_FLAGS "-Wfatal-errors", "-fPIC", "-shared", "-w", "-pipe",
 # define MJIT_CFLAGS_PIPE 1
 #else
 # define GCC_PIC_FLAGS /* empty */