diff --git a/src/mouse.c b/src/mouse.c
index f215d3d..00a2783 100644
--- a/src/mouse.c
+++ b/src/mouse.c
@@ -3019,7 +3019,7 @@
     varnumber_T winid = 0;
     varnumber_T winrow = 0;
     varnumber_T wincol = 0;
-    varnumber_T line = 0;
+    linenr_T	line = 0;
     varnumber_T column = 0;
 
     if (rettv_dict_alloc(rettv) != OK)
@@ -3061,7 +3061,7 @@
     dict_add_number(d, "winid", winid);
     dict_add_number(d, "winrow", winrow);
     dict_add_number(d, "wincol", wincol);
-    dict_add_number(d, "line", line);
+    dict_add_number(d, "line", (varnumber_T)line);
     dict_add_number(d, "column", column);
 }
 #endif