diff --git a/src/gallium/auxiliary/rtasm/rtasm_x86sse.c b/src/gallium/auxiliary/rtasm/rtasm_x86sse.c
index f675427d987..a5ff5367a91 100644
--- a/src/gallium/auxiliary/rtasm/rtasm_x86sse.c
+++ b/src/gallium/auxiliary/rtasm/rtasm_x86sse.c
@@ -1757,6 +1757,8 @@ void (*x86_get_func( struct x86_function *p ))(void)
 
 #else
 
+void x86sse_dummy( void );
+
 void x86sse_dummy( void )
 {
 }