diff --git a/R/data.table.R b/R/data.table.R
index b832a8370..4d76b55d2 100644
--- a/R/data.table.R
+++ b/R/data.table.R
@@ -1066,7 +1066,7 @@ chmatch2 <- function(x, table, nomatch=NA_integer_) {
                 keylen = which.first(!key(x) %chin% ansvars)-1L
                 if (is.na(keylen)) keylen = length(key(x))
                 if (keylen > length(rightcols) && !.Call(CisOrderedSubset, irows, nrow(x))) keylen = length(rightcols)
-                if (keylen && ((is.data.table(i) && haskey(i)) || is.logical(i) || (.Call(CisOrderedSubset, irows, nrow(x)) && (!roll || length(irows) == 1L)))) # see #1010. don't set key when i has no key, but irows is ordered and roll != FALSE
+                if (keylen && ((is.data.table(i) && haskey(i)) || is.logical(i) || (.Call(CisOrderedSubset, irows, nrow(x)) && ((roll == FALSE) || length(irows) == 1L)))) # see #1010. don't set key when i has no key, but irows is ordered and roll != FALSE
                     setattr(ans,"sorted",head(key(x),keylen))
             }
             setattr(ans, "class", class(x)) # fix for #5296
@@ -1177,7 +1177,7 @@ chmatch2 <- function(x, table, nomatch=NA_integer_) {
         byval = i
         bynames = head(key(x),length(leftcols))
         allbyvars = NULL
-        bysameorder = haskey(i) || (is.sorted(f__) && (!roll || length(f__) == 1L)) # Fix for #1010
+        bysameorder = haskey(i) || (is.sorted(f__) && ((roll == FALSE) || length(f__) == 1L)) # Fix for #1010
         ##  'av' correct here ??  *** TO DO ***
         xjisvars = intersect(av, names(x)[rightcols])  # no "x." for xvars.
         # if 'get' is in 'av' use all cols in 'i', fix for bug #5443
diff --git a/inst/tests/tests.Rraw b/inst/tests/tests.Rraw
index 1abe98166..3683f2dfc 100644
--- a/inst/tests/tests.Rraw
+++ b/inst/tests/tests.Rraw
@@ -5832,6 +5832,7 @@ test(1469.2, key(DT[J(c(2,0)), .(x,y), roll=TRUE]), NULL)
 test(1469.3, key(DT[J(c(2,0)), y, roll=TRUE, by=.EACHI]), NULL)
 test(1469.4, key(DT[J(c(2,0))]), NULL)
 test(1469.5, key(DT[SJ(c(2,0)), roll=TRUE]), "x")
+test(1469.6, key(DT[J(c(2,0)), roll="nearest"]), NULL)
 
 # 1007 fix, dealing with Inf and -Inf correctly in rolling joins.
 DT = data.table(x=c(-Inf, 3, Inf), y=1:3, key="x")