3 files changed, 3 insertions, 0 deletions
diff --git a/manual/examples/argp-ex1.c b/manual/examples/argp-ex1.c
index 50ac0ed978..7bb5f2241c 100644
--- a/manual/examples/argp-ex1.c
+++ b/manual/examples/argp-ex1.c
@@ -5,6 +5,7 @@
    messages and exit when there are any arguments, and print
    a (rather pointless) messages for --help.  */
 
+#include <stdlib.h>
 #include <argp.h>
 
 int main (int argc, char **argv)
diff --git a/manual/examples/argp-ex2.c b/manual/examples/argp-ex2.c
index 313c6819a2..c49fbaca94 100644
--- a/manual/examples/argp-ex2.c
+++ b/manual/examples/argp-ex2.c
@@ -19,6 +19,7 @@
    for a given program, even if it uses different argument
    parsers for various tasks).  */
 
+#include <stdlib.h>
 #include <argp.h>
 
 const char *argp_program_version =
diff --git a/manual/examples/argp-ex3.c b/manual/examples/argp-ex3.c
index 0ea9ce0751..a8a48ea685 100644
--- a/manual/examples/argp-ex3.c
+++ b/manual/examples/argp-ex3.c
@@ -52,6 +52,7 @@
 
    An options vector should be terminated by an option with all fields zero. */
 
+#include <stdlib.h>
 #include <argp.h>
 
 const char *argp_program_version =