diff --git a/src/config-amigaos.h b/src/config-amigaos.h
index ca700ad476fd21ffdac97211b9f1d342eb1f6e81..ab6d288262cdb8d311bfc816d0531064d5a3e880 100644
--- a/src/config-amigaos.h
+++ b/src/config-amigaos.h
@@ -2,6 +2,9 @@
 #ifndef CURL_CONFIG_AMIGAOS_H
 #define CURL_CONFIG_AMIGAOS_H
 
+/* Define to 1 if you want the built-in manual */
+#define USE_MANUAL 1
+
 #define OS "AmigaOS"
 
 #define HAVE_UNISTD_H		1
diff --git a/src/config-mac.h b/src/config-mac.h
index e43a9a5932e5eedfc249b3397e18ad68dad63fff..a6f58e68553d63c8622ec57c0ce39a8efbcdfa93 100644
--- a/src/config-mac.h
+++ b/src/config-mac.h
@@ -1,3 +1,6 @@
+/* Define to 1 if you want the built-in manual */
+#define USE_MANUAL 1
+
 #define HAVE_UNISTD_H		1
 #define HAVE_FCNTL_H		1
 #define HAVE_UTIME_H		1
diff --git a/src/config-netware.h b/src/config-netware.h
index 31180ac17d788e515babe538b1ac4151fb3461c8..20baa2ac0c7127c88c6c8e4790dd9a89940b1878 100644
--- a/src/config-netware.h
+++ b/src/config-netware.h
@@ -1,5 +1,8 @@
 /* lib/config.h.in.  Generated from configure.ac by autoheader.  */
 
+/* Define to 1 if you want the built-in manual */
+#define USE_MANUAL 1
+
 /* to disable DICT */
 #undef CURL_DISABLE_DICT
 
diff --git a/src/config-riscos.h b/src/config-riscos.h
index 79e1974bb41e26bf5c2deca3a637450ba268a836..46de289b9af0f6dc661402f1de6eea16db0b0644 100644
--- a/src/config-riscos.h
+++ b/src/config-riscos.h
@@ -11,6 +11,9 @@
 /* Define cpu-machine-OS */
 #define OS "ARM-RISC OS"
 
+/* Define to 1 if you want the built-in manual */
+#define USE_MANUAL 1
+
 /* Define if you have the gethostbyaddr_r() function with 5 arguments */
 #undef HAVE_GETHOSTBYADDR_R_5
 
diff --git a/src/config-vms.h b/src/config-vms.h
index 26aabd927ea4890f5276ed04e37e3046b09c8481..79f1ba7b76c48caf56544a87eec18d75f1321716 100644
--- a/src/config-vms.h
+++ b/src/config-vms.h
@@ -2,6 +2,9 @@
 /* Define cpu-machine-OS */
 #define OS "ALPHA-COMPAQ-VMS"
 
+/* Define to 1 if you want the built-in manual */
+#define USE_MANUAL 1
+
 /* Define if you have the <unistd.h> header file.  */
 #define HAVE_UNISTD_H 1
 
diff --git a/src/config-win32.h b/src/config-win32.h
index db2805900a2e918e44e6a2a50b7a83ab768d5d62..308ab2d2c1cc4274d4ae44fe00f7d0ef47564054 100644
--- a/src/config-win32.h
+++ b/src/config-win32.h
@@ -2,6 +2,9 @@
 /* Define if you have the stricmp function.  */
 #define HAVE_STRICMP 1
 
+/* Define to 1 if you want the built-in manual */
+#define USE_MANUAL 1
+
 /* Define cpu-machine-OS */
 #define OS "i386-pc-win32"