diff --git a/AUTHORS b/AUTHORS
index 9c3d990d6..fa3c02963 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -25,7 +25,7 @@ du: Torbjörn Granlund, David MacKenzie, Paul Eggert, Jim Meyering
 echo: Brian Fox, Chet Ramey
 env: Richard Mlynarik, David MacKenzie
 expand: David MacKenzie
-expr: Mike Parker, James Youngman
+expr: Mike Parker, James Youngman, Paul Eggert
 factor: Paul Rubin
 false: Jim Meyering
 fmt: Ross Paterson
diff --git a/src/expr.c b/src/expr.c
index de7a63de3..65e74af9f 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -145,7 +145,10 @@ mpz_out_str (FILE *stream, int base, mpz_t z)
 /* The official name of this program (e.g., no `g' prefix).  */
 #define PROGRAM_NAME "expr"
 
-#define AUTHORS proper_name ("Mike Parker"), proper_name ("James Youngman")
+#define AUTHORS \
+  proper_name ("Mike Parker"), \
+  proper_name ("James Youngman"), \
+  proper_name ("Paul Eggert")
 
 /* Exit statuses.  */
 enum