diff --git a/support/functions/_sys_check b/support/functions/_sys_check
index 20354cf..62880df 100644
--- a/support/functions/_sys_check
+++ b/support/functions/_sys_check
@@ -132,7 +132,7 @@ fi
 
 unset binvars; unset headervars; unset libvars;
 [ -z ${3+x} ] && binvars=( dialog grep gawk wget tar bzip2 svn xz upx patch gcc make scp sshpass openssl dos2unix ) || binvars=( $(echo "$3" | tr ' ' '\n') )
-[ -z ${4+x} ] && headervars=( crypto.h libusb.h pcsclite.h pthread.h ) || headervars=( $(echo "$4" | tr ' ' '\n') )
+[ -z ${4+x} ] && headervars=( crypto.h libusb.h pcsclite.h pthread.h opensslconf.h ) || headervars=( $(echo "$4" | tr ' ' '\n') )
 [ -z ${5+x} ] && libvars=( libccidtwin.so ) || libvars=( $(echo "$5" | tr ' ' '\n') )
 sanity=1