diff --git a/app/main/views/sign_in.py b/app/main/views/sign_in.py
index 9df748343..be313c59b 100644
--- a/app/main/views/sign_in.py
+++ b/app/main/views/sign_in.py
@@ -30,6 +30,7 @@ def _reformat_keystring(orig):
     new_keystring = orig.replace("-----BEGIN PRIVATE KEY-----", "")
     new_keystring = new_keystring.replace("-----END PRIVATE KEY-----", "")
     new_keystring = new_keystring.strip()
+    new_keystring = new_keystring.replace(" ", "\n")
     new_keystring = "\n".join(
         ["-----BEGIN PRIVATE KEY-----", new_keystring, "-----END PRIVATE KEY-----"]
     )
diff --git a/tests/app/main/views/test_sign_in.py b/tests/app/main/views/test_sign_in.py
index 345a1bd94..7970afa08 100644
--- a/tests/app/main/views/test_sign_in.py
+++ b/tests/app/main/views/test_sign_in.py
@@ -41,9 +41,11 @@ def test_render_sign_in_template_with_next_link_for_password_reset(client_reques
 
 
 def test_reformat_keystring():
-    orig = "-----BEGIN PRIVATE KEY----- blahblahblah -----END PRIVATE KEY-----"
+    orig = "-----BEGIN PRIVATE KEY----- blah blah blah -----END PRIVATE KEY-----"
     expected = """-----BEGIN PRIVATE KEY-----
-blahblahblah
+blah
+blah
+blah
 -----END PRIVATE KEY-----
 """
     reformatted = _reformat_keystring(orig)