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-rw-r--r--manual/math.texi3
1 files changed, 3 insertions, 0 deletions
diff --git a/manual/math.texi b/manual/math.texi
index a7d6c8821b..1ec597794f 100644
--- a/manual/math.texi
+++ b/manual/math.texi
@@ -1445,6 +1445,9 @@ c = 0xb = 11
 but they can also be changed by the user.  @code{m} is of course 2^48
 since the state consists of a 48-bit array.
 
+The prototypes for these functions are in @file{stdlib.h}.
+@pindex stdlib.h
+
 
 @comment stdlib.h
 @comment SVID