diff --git a/src/selection.cc b/src/selection.cc
index 781f7c4f..d637e007 100644
--- a/src/selection.cc
+++ b/src/selection.cc
@@ -413,7 +413,7 @@ void SelectionList::insert(ConstArrayView<String> strings, InsertMode mode,
             auto& min = sel.min();
             auto& max = sel.max();
             min = range.begin;
-            max = m_buffer->char_prev(range.end);
+            max = range.end > range.begin ? m_buffer->char_prev(range.end) : range.begin;
         }
         else
         {
diff --git a/test/regression/3275-crash-on-replace-at-buffer-start/cmd b/test/regression/3275-crash-on-replace-at-buffer-start/cmd
new file mode 100644
index 00000000..331bae08
--- /dev/null
+++ b/test/regression/3275-crash-on-replace-at-buffer-start/cmd
@@ -0,0 +1 @@
+R
diff --git a/test/regression/3275-crash-on-replace-at-buffer-start/in b/test/regression/3275-crash-on-replace-at-buffer-start/in
new file mode 100644
index 00000000..257cc564
--- /dev/null
+++ b/test/regression/3275-crash-on-replace-at-buffer-start/in
@@ -0,0 +1 @@
+foo
diff --git a/test/regression/3275-crash-on-replace-at-buffer-start/out b/test/regression/3275-crash-on-replace-at-buffer-start/out
new file mode 100644
index 00000000..c1cccefc
--- /dev/null
+++ b/test/regression/3275-crash-on-replace-at-buffer-start/out
@@ -0,0 +1 @@
+oo