diff --git a/config.guess b/config.guess
index f6d217a..b7f5e24 100755
--- a/config.guess
+++ b/config.guess
@@ -4,7 +4,7 @@
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2024-01-01'
+timestamp='2024-04-03'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -634,7 +634,8 @@ EOF
 		sed 's/^		//' << EOF > "$dummy.c"
 		#include <sys/systemcfg.h>
 
-		main()
+		int
+		main ()
 			{
 			if (!__power_pc())
 				exit(1);
@@ -718,7 +719,8 @@ EOF
 		#include <stdlib.h>
 		#include <unistd.h>
 
-		int main ()
+		int
+		main ()
 		{
 		#if defined(_SC_KERNEL_BITS)
 		    long bits = sysconf(_SC_KERNEL_BITS);
@@ -1621,6 +1623,7 @@ cat > "$dummy.c" <<EOF
 #endif
 #endif
 #endif
+int
 main ()
 {
 #if defined (sony)
diff --git a/doc/config.guess.1 b/doc/config.guess.1
index 37cf22d..e776868 100644
--- a/doc/config.guess.1
+++ b/doc/config.guess.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.48.5.
-.TH CONFIG.GUESS "1" "January 2024" "GNU config.guess (2024-01-01)" "User Commands"
+.TH CONFIG.GUESS "1" "May 2024" "GNU config.guess (2024-04-03)" "User Commands"
 .SH NAME
 config.guess \- guess the build system triplet
 .SH SYNOPSIS