diff --git a/grid.c b/grid.c
index 51d76191..1347c863 100644
--- a/grid.c
+++ b/grid.c
@@ -10,7 +10,7 @@
 #include "util.h"
 
 void
-grid_swap_row(struct grid *grid, int row_a, int row_b, bool initialize)
+grid_swap_row(struct grid *grid, int row_a, int row_b)
 {
     assert(grid->offset >= 0);
     assert(row_a != row_b);
diff --git a/grid.h b/grid.h
index d4b1aa25..b074381e 100644
--- a/grid.h
+++ b/grid.h
@@ -3,7 +3,7 @@
 #include <stddef.h>
 #include "terminal.h"
 
-void grid_swap_row(struct grid *grid, int row_a, int row_b, bool initialize);
+void grid_swap_row(struct grid *grid, int row_a, int row_b);
 struct row *grid_row_alloc(int cols, bool initialize);
 void grid_row_free(struct row *row);
 void grid_reflow(
diff --git a/terminal.c b/terminal.c
index 45392ec3..9686d237 100644
--- a/terminal.c
+++ b/terminal.c
@@ -1750,11 +1750,11 @@ term_scroll_partial(struct terminal *term, struct scroll_region region, int rows
 
     /* Top non-scrolling region. */
     for (int i = region.start - 1; i >= 0; i--)
-        grid_swap_row(term->grid, i - rows, i, false);
+        grid_swap_row(term->grid, i - rows, i);
 
     /* Bottom non-scrolling region */
     for (int i = term->rows - 1; i >= region.end; i--)
-        grid_swap_row(term->grid, i - rows, i, false);
+        grid_swap_row(term->grid, i - rows, i);
 
     /* Erase scrolled in lines */
     for (int r = begin_scrolled_in; r < end_scrolled_in; r++)
@@ -1806,11 +1806,11 @@ term_scroll_reverse_partial(struct terminal *term,
 
     /* Bottom non-scrolling region */
     for (int i = region.end + rows; i < term->rows + rows; i++)
-        grid_swap_row(term->grid, i, i - rows, false);
+        grid_swap_row(term->grid, i, i - rows);
 
     /* Top non-scrolling region */
     for (int i = 0 + rows; i < region.start + rows; i++)
-        grid_swap_row(term->grid, i, i - rows, false);
+        grid_swap_row(term->grid, i, i - rows);
 
     /* Erase scrolled in lines */
     for (int r = start_scrolled_in; r < end_scrolled_in; r++)