diff --git a/fmt/fmt_strm_malloc.3 b/fmt/fmt_strm_malloc.3
index 8966301..d78eac9 100644
--- a/fmt/fmt_strm_malloc.3
+++ b/fmt/fmt_strm_malloc.3
@@ -2,6 +2,7 @@
 .SH NAME
 fmt_strm_malloc \- write multiple ASCII strings
 .SH SYNTAX
+.B #include <stdlib.h>
 .B #include <libowfat/fmt.h>
 
 char* \fBfmt_strm_malloc\fP(const char *\fIsource\fR, ...);