diff --git a/src/evalvars.c b/src/evalvars.c
index cb31966..bd096df 100644
--- a/src/evalvars.c
+++ b/src/evalvars.c
@@ -157,6 +157,7 @@
     {VV_NAME("sizeoflong",	 VAR_NUMBER), NULL, VV_RO},
     {VV_NAME("sizeofpointer",	 VAR_NUMBER), NULL, VV_RO},
     {VV_NAME("maxcol",		 VAR_NUMBER), NULL, VV_RO},
+    {VV_NAME("python3_version",	 VAR_NUMBER), NULL, VV_RO},
 };
 
 // shorthand
@@ -264,6 +265,10 @@
 
     set_vim_var_dict(VV_COLORNAMES, dict_alloc());
 
+#ifdef FEAT_PYTHON3
+    set_vim_var_nr(VV_PYTHON3_VERSION, python3_version());
+#endif
+
     // Default for v:register is not 0 but '"'.  This is adjusted once the
     // clipboard has been setup by calling reset_reg_var().
     set_reg_var(0);