diff --git a/NEWS.md b/NEWS.md
index 1e63c1a2d1..9a97bc6839 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,7 @@
 # dplyr (development version)
 
+* `tally_n()` creates fully qualified funciton calls for duckplyr compatibility (#7046)
+
 * `storms` has been updated to include 2023 and 2024 data (#7111, @tomalrussell).
 
 * Empty `rowwise()` list-column elements now resolve to `logical()` rather than a random logical of length 1 (#7710).
diff --git a/R/count-tally.R b/R/count-tally.R
index de0f1546d2..e3d768cecd 100644
--- a/R/count-tally.R
+++ b/R/count-tally.R
@@ -236,9 +236,9 @@ add_tally <- function(x, wt = NULL, sort = FALSE, name = NULL) {
 
 tally_n <- function(x, wt) {
   if (quo_is_null(wt)) {
-    expr(n())
+    expr(dplyr::n())
   } else {
-    expr(sum(!!wt, na.rm = TRUE))
+    expr(base::sum(!!wt, na.rm = TRUE))
   }
 }
 
diff --git a/tests/testthat/_snaps/count-tally.md b/tests/testthat/_snaps/count-tally.md
index a026cf0dcc..ad66d21743 100644
--- a/tests/testthat/_snaps/count-tally.md
+++ b/tests/testthat/_snaps/count-tally.md
@@ -55,7 +55,7 @@
     Output
       <error/rlang_error>
       Error in `count()`:
-      i In argument: `n = sum(1 + "", na.rm = TRUE)`.
+      i In argument: `n = base::sum(1 + "", na.rm = TRUE)`.
       Caused by error in `1 + ""`:
       ! non-numeric argument to binary operator
 
@@ -84,7 +84,7 @@
     Output
       <error/rlang_error>
       Error in `tally()`:
-      i In argument: `n = sum(1 + "", na.rm = TRUE)`.
+      i In argument: `n = base::sum(1 + "", na.rm = TRUE)`.
       Caused by error in `1 + ""`:
       ! non-numeric argument to binary operator
 
@@ -143,7 +143,7 @@
     Output
       <error/dplyr:::mutate_error>
       Error in `add_count()`:
-      i In argument: `n = sum(1 + "", na.rm = TRUE)`.
+      i In argument: `n = base::sum(1 + "", na.rm = TRUE)`.
       Caused by error in `1 + ""`:
       ! non-numeric argument to binary operator
 
@@ -154,7 +154,7 @@
     Output
       <error/dplyr:::mutate_error>
       Error in `add_tally()`:
-      i In argument: `n = sum(1 + "", na.rm = TRUE)`.
+      i In argument: `n = base::sum(1 + "", na.rm = TRUE)`.
       Caused by error in `1 + ""`:
       ! non-numeric argument to binary operator