diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c62927f098d..6f5959fba5b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 1999-12-02  Nick Clifton  <nickc@cygnus.com>
 
+	* config/fp-bit.c: Initialise all fields of the NAN
+	constants. 
+
 	* c-lex.c (check_newline): Pass pragma_getc and pragma_ungetc
 	to HANDLE_PRAGMA.
 
diff --git a/gcc/config/fp-bit.c b/gcc/config/fp-bit.c
index 09825416786..d7bc3de38f4 100644
--- a/gcc/config/fp-bit.c
+++ b/gcc/config/fp-bit.c
@@ -395,9 +395,9 @@ FLO_union_type;
 #else
 
 #if   defined L_thenan_sf
-const fp_number_type __thenan_sf = { CLASS_SNAN };
+const fp_number_type __thenan_sf = { CLASS_SNAN, 0, 0, (fractype) 0 };
 #elif defined L_thenan_df
-const fp_number_type __thenan_df = { CLASS_SNAN };
+const fp_number_type __thenan_df = { CLASS_SNAN, 0, 0, (fractype) 0 };
 #elif defined FLOAT
 extern const fp_number_type __thenan_sf;
 #else