diff --git a/driver-csi.c b/driver-csi.c
index d305356..0609e64 100644
--- a/driver-csi.c
+++ b/driver-csi.c
@@ -160,6 +160,7 @@ static TermKeyResult handle_csi_mouse(TermKey *tk, TermKeyKey *key, int cmd, lon
   cmd &= 0xff;
 
   if(!initial && args >= 3) { // rxvt protocol
+    key->type = TERMKEY_TYPE_MOUSE;
     key->code.mouse[0] = arg[0];
 
     key->modifiers     = (key->code.mouse[0] & 0x1c) >> 2;
@@ -171,6 +172,7 @@ static TermKeyResult handle_csi_mouse(TermKey *tk, TermKeyKey *key, int cmd, lon
   }
 
   if(initial == '<' && args >= 3) { // SGR protocol
+    key->type = TERMKEY_TYPE_MOUSE;
     key->code.mouse[0] = arg[0];
 
     key->modifiers     = (key->code.mouse[0] & 0x1c) >> 2;
diff --git a/t/30mouse.c b/t/30mouse.c
index 0b069a8..91724e2 100644
--- a/t/30mouse.c
+++ b/t/30mouse.c
@@ -16,10 +16,12 @@ int main(int argc, char *argv[])
 
   termkey_push_bytes(tk, "\e[M !!", 6);
 
+  key.type = -1;
   is_int(termkey_getkey(tk, &key), TERMKEY_RES_KEY, "getkey yields RES_KEY for mouse press");
 
   is_int(key.type, TERMKEY_TYPE_MOUSE, "key.type for mouse press");
 
+  ev = -1; button = -1; line = -1; col = -1;
   is_int(termkey_interpret_mouse(tk, &key, &ev, &button, &line, &col), TERMKEY_RES_KEY, "interpret_mouse yields RES_KEY");
 
   is_int(ev,     TERMKEY_MOUSE_PRESS, "mouse event for press");
@@ -38,6 +40,8 @@ int main(int argc, char *argv[])
 
   termkey_push_bytes(tk, "\e[M@\"!", 6);
 
+  key.type = -1;
+  ev = -1; button = -1; line = -1; col = -1;
   termkey_getkey(tk, &key);
   is_int(termkey_interpret_mouse(tk, &key, &ev, &button, &line, &col), TERMKEY_RES_KEY, "interpret_mouse yields RES_KEY");
 
@@ -49,6 +53,8 @@ int main(int argc, char *argv[])
 
   termkey_push_bytes(tk, "\e[M##!", 6);
 
+  key.type = -1;
+  ev = -1; button = -1; line = -1; col = -1;
   termkey_getkey(tk, &key);
   is_int(termkey_interpret_mouse(tk, &key, &ev, &button, &line, &col), TERMKEY_RES_KEY, "interpret_mouse yields RES_KEY");
 
@@ -59,6 +65,8 @@ int main(int argc, char *argv[])
 
   termkey_push_bytes(tk, "\e[M0++", 6);
 
+  key.type = -1;
+  ev = -1; button = -1; line = -1; col = -1;
   termkey_getkey(tk, &key);
   is_int(termkey_interpret_mouse(tk, &key, &ev, &button, &line, &col), TERMKEY_RES_KEY, "interpret_mouse yields RES_KEY");
 
@@ -75,6 +83,7 @@ int main(int argc, char *argv[])
   // rxvt protocol
   termkey_push_bytes(tk, "\e[0;20;20M", 10);
 
+  key.type = -1;
   is_int(termkey_getkey(tk, &key), TERMKEY_RES_KEY, "getkey yields RES_KEY for mouse press rxvt protocol");
 
   is_int(key.type, TERMKEY_TYPE_MOUSE, "key.type for mouse press rxvt protocol");
@@ -93,6 +102,7 @@ int main(int argc, char *argv[])
 
   is_int(key.type, TERMKEY_TYPE_MOUSE, "key.type for mouse release rxvt protocol");
 
+  ev = -1; button = -1; line = -1; col = -1;
   is_int(termkey_interpret_mouse(tk, &key, &ev, &button, &line, &col), TERMKEY_RES_KEY, "interpret_mouse yields RES_KEY");
 
   is_int(ev,     TERMKEY_MOUSE_RELEASE, "mouse event for release rxvt protocol");
@@ -103,10 +113,12 @@ int main(int argc, char *argv[])
   // SGR protocol
   termkey_push_bytes(tk, "\e[<0;30;30M", 11);
 
+  key.type = -1;
   is_int(termkey_getkey(tk, &key), TERMKEY_RES_KEY, "getkey yields RES_KEY for mouse press SGR encoding");
 
   is_int(key.type, TERMKEY_TYPE_MOUSE, "key.type for mouse press SGR encoding");
 
+  ev = -1; button = -1; line = -1; col = -1;
   is_int(termkey_interpret_mouse(tk, &key, &ev, &button, &line, &col), TERMKEY_RES_KEY, "interpret_mouse yields RES_KEY");
 
   is_int(ev,     TERMKEY_MOUSE_PRESS, "mouse event for press SGR");
@@ -117,16 +129,20 @@ int main(int argc, char *argv[])
 
   termkey_push_bytes(tk, "\e[<0;30;30m", 11);
 
+  key.type = -1;
   is_int(termkey_getkey(tk, &key), TERMKEY_RES_KEY, "getkey yields RES_KEY for mouse release SGR encoding");
 
   is_int(key.type, TERMKEY_TYPE_MOUSE, "key.type for mouse release SGR encoding");
 
+  ev = -1; button = -1; line = -1; col = -1;
   is_int(termkey_interpret_mouse(tk, &key, &ev, &button, &line, &col), TERMKEY_RES_KEY, "interpret_mouse yields RES_KEY");
 
   is_int(ev,     TERMKEY_MOUSE_RELEASE, "mouse event for release SGR");
 
   termkey_push_bytes(tk, "\e[<0;500;300M", 13);
 
+  key.type = -1;
+  ev = -1; button = -1; line = -1; col = -1;
   termkey_getkey(tk, &key);
   termkey_interpret_mouse(tk, &key, &ev, &button, &line, &col);