diff --git a/marginalia_nu/src/main/java/nu/marginalia/wmsa/edge/converting/processor/logic/LinkParser.java b/marginalia_nu/src/main/java/nu/marginalia/wmsa/edge/converting/processor/logic/LinkParser.java
index 5e893725..45611e08 100644
--- a/marginalia_nu/src/main/java/nu/marginalia/wmsa/edge/converting/processor/logic/LinkParser.java
+++ b/marginalia_nu/src/main/java/nu/marginalia/wmsa/edge/converting/processor/logic/LinkParser.java
@@ -126,6 +126,9 @@ public class LinkParser {
         if (doesUrlStringHaveProtocol(s)) {
             return s;
         }
+        else if (s.startsWith("//")) { // scheme-relative URL
+            return baseUrl.proto + ":" + s;
+        }
 
         String[] parts = paramSeparatorPattern.split(s, 2);
         String path = parts[0];
diff --git a/marginalia_nu/src/test/java/nu/marginalia/wmsa/edge/crawling/LinkParserTest.java b/marginalia_nu/src/test/java/nu/marginalia/wmsa/edge/crawling/LinkParserTest.java
index d4a7e428..065310f7 100644
--- a/marginalia_nu/src/test/java/nu/marginalia/wmsa/edge/crawling/LinkParserTest.java
+++ b/marginalia_nu/src/test/java/nu/marginalia/wmsa/edge/crawling/LinkParserTest.java
@@ -45,6 +45,7 @@ class LinkParserTest {
 
     @Test
     void testRelative() throws URISyntaxException {
+        assertEquals("http://search.marginalia.nu/", parseLink("//search.marginalia.nu", "/"));
         assertEquals("http://www.marginalia.nu/test", parseLink("../test", "/"));
         assertEquals("http://www.marginalia.nu/test", parseLink("test", "/"));
         assertEquals("http://www.marginalia.nu/foo/test", parseLink("test", "/foo/index.html"));