diff --git a/src/float.c b/src/float.c
index 4c8e5fe10a..fcdaaefa99 100644
--- a/src/float.c
+++ b/src/float.c
@@ -345,6 +345,9 @@ f_fmod(typval_T *argvars, typval_T *rettv)
     void
 f_isinf(typval_T *argvars, typval_T *rettv)
 {
+    rettv->v_type = VAR_NUMBER;
+    rettv->vval.v_number = 0;
+
     if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
 	return;
 
@@ -358,6 +361,9 @@ f_isinf(typval_T *argvars, typval_T *rettv)
     void
 f_isnan(typval_T *argvars, typval_T *rettv)
 {
+    rettv->v_type = VAR_NUMBER;
+    rettv->vval.v_number = 0;
+
     if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
 	return;
 
diff --git a/src/version.c b/src/version.c
index 1e231bf31f..f58befda00 100644
--- a/src/version.c
+++ b/src/version.c
@@ -724,6 +724,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1765,
 /**/
     1764,
 /**/