diff --git a/bsd-user/elfload.c b/bsd-user/elfload.c
index 678f3e6ad9895af068b85ed46bcb34c809c09141..48ec4ac150ee677dd946f6ef52c368942642a657 100644
--- a/bsd-user/elfload.c
+++ b/bsd-user/elfload.c
@@ -545,8 +545,6 @@ static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
         memcpy(to, from, n);
 }
 
-extern unsigned long x86_stack_size;
-
 static int load_aout_interp(void * exptr, int interp_fd);
 
 #ifdef BSWAP_NEEDED
diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h
index 822a214451ef55825238847c53d340bdc06d81e5..d37561138350208c1646442f8a129afd4b5d72de 100644
--- a/bsd-user/qemu.h
+++ b/bsd-user/qemu.h
@@ -193,6 +193,9 @@ void mmap_fork_start(void);
 void mmap_fork_end(int child);
 #endif
 
+/* main.c */
+extern unsigned long x86_stack_size;
+
 /* user access */
 
 #define VERIFY_READ 0