diff --git a/t/01base.c b/t/01base.c
index 3f7ef13..54ad44d 100644
--- a/t/01base.c
+++ b/t/01base.c
@@ -6,12 +6,14 @@ int main(int argc, char *argv[])
 {
   TermKey   *tk;
 
-  plan_tests(2);
+  plan_tests(3);
 
   tk = termkey_new_abstract("vt100", 0);
 
   ok(!!tk, "termkey_new_abstract");
 
+  is_int(termkey_get_buffer_size(tk), 256, "termkey_get_buffer_size");
+
   termkey_destroy(tk);
 
   ok(1, "termkey_free");
diff --git a/termkey.c b/termkey.c
index e3daa3e..1cc964b 100644
--- a/termkey.c
+++ b/termkey.c
@@ -461,6 +461,11 @@ void termkey_set_canonflags(TermKey *tk, int flags)
     tk->flags &= ~TERMKEY_FLAG_SPACESYMBOL;
 }
 
+size_t termkey_get_buffer_size(TermKey *tk)
+{
+  return tk->buffsize;
+}
+
 size_t termkey_get_buffer_remaining(TermKey *tk)
 {
   /* Return the total number of free bytes in the buffer, because that's what
diff --git a/termkey.h.in b/termkey.h.in
index 1db9d4d..6c1af1e 100644
--- a/termkey.h.in
+++ b/termkey.h.in
@@ -172,6 +172,8 @@ void termkey_set_waittime(TermKey *tk, int msec);
 int  termkey_get_canonflags(TermKey *tk);
 void termkey_set_canonflags(TermKey *tk, int);
 
+size_t termkey_get_buffer_size(TermKey *tk);
+
 size_t termkey_get_buffer_remaining(TermKey *tk);
 
 void termkey_canonicalise(TermKey *tk, TermKeyKey *key);