diff --git a/src/dfmt/formatter.d b/src/dfmt/formatter.d
index 6f9b7cc..c922c5f 100644
--- a/src/dfmt/formatter.d
+++ b/src/dfmt/formatter.d
@@ -9,8 +9,9 @@ module dfmt.formatter;
 import dparse.lexer;
 import dparse.parser;
 import dparse.rollback_allocator;
-import dfmt.config;
 import dfmt.ast_info;
+import dfmt.config;
+import dfmt.editorconfig : OptionalBoolean;
 import dfmt.indentation;
 import dfmt.tokens;
 import dfmt.wrapping;
@@ -477,7 +478,8 @@ private:
         immutable j = justAddedExtraNewline;
         if (currIsSlashSlash)
         {
-            newline();
+            if (config.dfmt_keep_line_breaks != OptionalBoolean.t)
+                newline();
             justAddedExtraNewline = j;
         }
         else if (hasCurrent)
@@ -584,8 +586,6 @@ private:
     }
     do
     {
-        import dfmt.editorconfig : OptionalBoolean;
-
         immutable p = current.type;
         regenLineBreakHintsIfNecessary(index);
         writeToken();
diff --git a/tests/allman/issue0490.d.ref b/tests/allman/issue0490.d.ref
new file mode 100644
index 0000000..0a25298
--- /dev/null
+++ b/tests/allman/issue0490.d.ref
@@ -0,0 +1,6 @@
+void foo()
+{
+    afdsafds
+        .asdf // blah
+        .flub;
+}
diff --git a/tests/issue0490.args b/tests/issue0490.args
new file mode 100644
index 0000000..7e7e52d
--- /dev/null
+++ b/tests/issue0490.args
@@ -0,0 +1 @@
+--keep_line_breaks=true
diff --git a/tests/issue0490.d b/tests/issue0490.d
new file mode 100644
index 0000000..0a25298
--- /dev/null
+++ b/tests/issue0490.d
@@ -0,0 +1,6 @@
+void foo()
+{
+    afdsafds
+        .asdf // blah
+        .flub;
+}
diff --git a/tests/otbs/issue0490.d.ref b/tests/otbs/issue0490.d.ref
new file mode 100644
index 0000000..7332368
--- /dev/null
+++ b/tests/otbs/issue0490.d.ref
@@ -0,0 +1,5 @@
+void foo() {
+    afdsafds
+        .asdf // blah
+        .flub;
+}