diff --git a/include/em.h b/include/em.h
index dbeb41945..a69c9598d 100644
--- a/include/em.h
+++ b/include/em.h
@@ -78,22 +78,22 @@ struct em_copy {
 unsigned char __fastcall__ em_load_driver (const char* driver);
 /* Load an extended memory driver and return an error code */
 
-unsigned char em_unload (void);
+unsigned char __fastcall__ em_unload (void);
 /* Unload the currently loaded driver. */
 
-unsigned em_pagecount (void);
+unsigned __fastcall__ em_pagecount (void);
 /* Return the total number of 256 byte pages available in extended memory. */
 
 void* __fastcall__ em_map (unsigned page);
 /* Unmap the current page from memory and map a new one. The function returns
- * a pointer to the location of the page in memory. Note: Without calling 
+ * a pointer to the location of the page in memory. Note: Without calling
  * em_commit, the old contents of the memory window may be lost!
  */
 
 void __fastcall__ em_commit (void);
 /* Commit changes in the memory window to extended storage. If the contents
  * of the memory window have been changed, these changes may be lost if
- * em_map, em_copyfrom or em_copyto are called without calling em_commit 
+ * em_map, em_copyfrom or em_copyto are called without calling em_commit
  * first. Note: Not calling em_commit does not mean that the changes are
  * discarded, it does just mean that some drivers will discard the changes.
  */