diff --git a/src/alloc.c b/src/alloc.c
index 53af7325f47..39964c4b293 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -302,15 +302,11 @@ static intptr_t garbage_collection_inhibited;
 
 const char *pending_malloc_warning;
 
-#if 0 /* Normally, pointer sanity only on request... */
+/* Pointer sanity only on request.  FIXME: Code depending on
+   SUSPICIOUS_OBJECT_CHECKING is obsolete; remove it entirely.  */
 #ifdef ENABLE_CHECKING
 #define SUSPICIOUS_OBJECT_CHECKING 1
 #endif
-#endif
-
-/* ... but unconditionally use SUSPICIOUS_OBJECT_CHECKING while the GC
-   bug is unresolved.  */
-#define SUSPICIOUS_OBJECT_CHECKING 1
 
 #ifdef SUSPICIOUS_OBJECT_CHECKING
 struct suspicious_free_record
@@ -327,8 +323,8 @@ static int suspicious_free_history_index;
 static void *find_suspicious_object_in_range (void *begin, void *end);
 static void detect_suspicious_free (void *ptr);
 #else
-# define find_suspicious_object_in_range(begin, end) NULL
-# define detect_suspicious_free(ptr) (void)
+# define find_suspicious_object_in_range(begin, end) ((void *) NULL)
+# define detect_suspicious_free(ptr) ((void) 0)
 #endif
 
 /* Maximum amount of C stack to save when a GC happens.  */
diff --git a/src/data.c b/src/data.c
index 8344bfdd3d5..2797adfcdc8 100644
--- a/src/data.c
+++ b/src/data.c
@@ -771,10 +771,7 @@ DEFUN ("fset", Ffset, Sfset, 2, 2, 0,
   if (AUTOLOADP (function))
     Fput (symbol, Qautoload, XCDR (function));
 
-  /* Convert to eassert or remove after GC bug is found.  In the
-     meantime, check unconditionally, at a slight perf hit.  */
-  if (! valid_lisp_object_p (definition))
-    emacs_abort ();
+  eassert (valid_lisp_object_p (definition));
 
   set_symbol_function (symbol, definition);