diff --git a/include/selectors.h b/include/selectors.h
index 8ca897f..a203354 100644
--- a/include/selectors.h
+++ b/include/selectors.h
@@ -16,6 +16,7 @@
 extern WORD SELECTOR_ReallocBlock( WORD sel, const void *base, DWORD size,
                                    enum seg_type type, BOOL32 is32bit,
                                    BOOL32 readonly );
+extern void SELECTOR_MoveBlock( WORD sel, const void *new_base );
 extern void SELECTOR_FreeBlock( WORD sel, WORD count );
 
 #ifdef __i386__