diff --git a/man/tio.1.in b/man/tio.1.in
index 4c107fe..f15c400 100644
--- a/man/tio.1.in
+++ b/man/tio.1.in
@@ -34,9 +34,11 @@ Set flow control (default: none).
 
 Set stop bits (default: 1).
 .TP
-.BR \-p ", " "\-\-parity odd" | even | none | mark
+.BR \-p ", " "\-\-parity odd" | even | none | mark | space
 
 Set parity (default: none).
+
+Note: With mark parity the parity bit is always 0. With space parity the parity bit is always 1. Not all platforms support mark and space parity.
 .TP
 .BR \-o ", " "\-\-output\-delay " \fI<ms>
 
diff --git a/src/tty.c b/src/tty.c
index 5c6c7af..3ed2ef2 100644
--- a/src/tty.c
+++ b/src/tty.c
@@ -625,10 +625,16 @@ void tty_configure(void)
     }
     else if ( strcmp("mark", option.parity) == 0)
     {
-        tio.c_cflag &= ~PARENB;
+        tio.c_cflag |= PARENB;
         tio.c_cflag |= PARODD;
         tio.c_cflag |= CMSPAR;
     }
+    else if ( strcmp("space", option.parity) == 0)
+    {
+        tio.c_cflag |= PARENB;
+        tio.c_cflag &= ~PARODD;
+        tio.c_cflag |= CMSPAR;
+    }
     else
     {
         error_printf("Invalid parity");