1 files changed, 2 insertions, 0 deletions
diff --git a/perl.h b/perl.h
index 237c2d1f96..ca25717b8f 100644
--- a/perl.h
+++ b/perl.h
@@ -3781,6 +3781,8 @@ Gid_t getegid (void);
 			"\", line %d", STRINGIFY(what), __LINE__),	\
 	    (void) 0)))
 
+/* assert() gets defined if DEBUGGING (and I_ASSERT).
+ * If no DEBUGGING, the <assert.h> has not been included. */
 #ifndef assert
 #  define assert(what)	Perl_assert(what)
 #endif