1 files changed, 4 insertions, 0 deletions
diff --git a/man3/stpcpy.3 b/man3/stpcpy.3
index 40f28e6f9a..8a3071ab09 100644
--- a/man3/stpcpy.3
+++ b/man3/stpcpy.3
@@ -59,12 +59,16 @@ to concatenate \fBfoo\fP and
 .in +4n
 .nf
 
+#define _GNU_SOURCE
 #include <string.h>
+#include <stdio.h>
 
 int
 main(void)
 {
+    char buffer[20];
     char *to = buffer;
+
     to = stpcpy(to, "foo");
     to = stpcpy(to, "bar");
     printf("%s\\n", buffer);