diff --git a/editors/ed.c b/editors/ed.c
index 8ec23d07f..a02634ec7 100644
--- a/editors/ed.c
+++ b/editors/ed.c
@@ -345,6 +345,8 @@ static int insertLine(int num, const char *data, int len)
 	lp->prev->next = newLp;
 	lp->prev = newLp;
 
+	if (num <= curNum)
+		curLine = curLine->prev;
 	lastNum++;
 	dirty = TRUE;
 	return setCurNum(num);
diff --git a/testsuite/ed.tests b/testsuite/ed.tests
new file mode 100755
index 000000000..475fdc244
--- /dev/null
+++ b/testsuite/ed.tests
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+. ./testing.sh
+
+# testing "test name" "command" "expected result" "file input" "stdin"
+
+testing "ed insert text before current line" \
+	"ed input" "8\n1\ntext\n2\n3\n4\n13\n" "1\n2\n3\n4\n" '2i
+text
+.
+,p
+w
+q
+'
+
+testing "ed read text before current line" \
+	"ed input" "8\n8\n1\n2\n1\n2\n3\n4\n3\n4\n16\n" "1\n2\n3\n4\n" '2r input
+,p
+w
+q
+'