diff --git a/libio/ChangeLog b/libio/ChangeLog
index 803adfcfcd0..6ec865b0e47 100644
--- a/libio/ChangeLog
+++ b/libio/ChangeLog
@@ -1,3 +1,7 @@
+1997-10-02  Brendan Kehoe  <brendan@lisa.cygnus.com>
+
+	* iostream.cc (operator<<): Use `#if _G_HAVE_PRINTF_FP', not ifdef.
+
 Thu Oct  2 10:36:49 1997  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* gen-params: Fix __printf_fp test.
diff --git a/libio/iostream.cc b/libio/iostream.cc
index 383d4656091..99ed592c539 100644
--- a/libio/iostream.cc
+++ b/libio/iostream.cc
@@ -615,7 +615,7 @@ ostream& ostream::operator<<(double n)
 	  prec = 6; /* default */
 
 	// Do actual conversion.
-#ifdef _G_HAVE_PRINTF_FP
+#if _G_HAVE_PRINTF_FP
 	{
 	  struct printf_info info = { prec: prec,
 				      width: width(0),