diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc95bf4f34..9d973e3a8d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ All notable changes to this project will be documented in this file.
 ### Bugfixes
 - [GUI] Splitter and tabstrip visual improvements (#2413 by: HebaruSan; reviewed: politas)
 - [GUI] Fix "Collection was modified" exception for redundant optional dependencies (#2423 by: HebaruSan; reviewed: politas)
+- [core] Treat installed DLC as compatible dependency (#2424 by: HebaruSan; reviewed: politas)
 
 ### Internal
 
diff --git a/Core/Registry/Registry.cs b/Core/Registry/Registry.cs
index b54c672e98..3a16542220 100644
--- a/Core/Registry/Registry.cs
+++ b/Core/Registry/Registry.cs
@@ -498,7 +498,8 @@ private bool allDependenciesCompatible(CkanModule mod, KspVersionCriteria ksp_ve
                 {
                     try
                     {
-                        if (!LatestAvailableWithProvides(dependency.name, ksp_version).Any())
+                        if (!dependency.MatchesAny(null, InstalledDlls.ToHashSet(), InstalledDlc)
+                            && !LatestAvailableWithProvides(dependency.name, ksp_version).Any())
                         {
                             return false;
                         }
diff --git a/GUI/MainModInfo.cs b/GUI/MainModInfo.cs
index 445d46c2f2..b10d8ceaa0 100644
--- a/GUI/MainModInfo.cs
+++ b/GUI/MainModInfo.cs
@@ -302,6 +302,13 @@ private TreeNode findDependencyShallow(IRegistryQuerier registry, string identif
             }
             catch (ModuleNotFoundKraken)
             {
+                // Maybe it's a DLC?
+                ModuleVersion installedVersion = registry.InstalledVersion(identifier, false);
+                if (installedVersion != null)
+                {
+                    return nonModuleNode(identifier, installedVersion, relationship);
+                }
+
                 // If we don't find a module by this name, look for other modules that provide it.
                 List<CkanModule> dependencyModules = registry.LatestAvailableWithProvides(identifier, crit);
                 if (dependencyModules != null && dependencyModules.Count > 0)
@@ -342,6 +349,16 @@ private TreeNode indexedNode(IRegistryQuerier registry, CkanModule module, Relat
             };
         }
 
+        private TreeNode nonModuleNode(string identifier, ModuleVersion version, RelationshipType relationship)
+        {
+            int icon = (int)relationship + 1;
+            return new TreeNode($"{identifier} {version}", icon, icon)
+            {
+                Name        = identifier,
+                ToolTipText = relationship.ToString()
+            };
+        }
+
         private TreeNode nonindexedNode(string identifier, RelationshipType relationship)
         {
             // Completely nonexistent dependency, e.g. "AJE"
diff --git a/Tests/Core/Registry/Registry.cs b/Tests/Core/Registry/Registry.cs
index 9c58e91f6c..d810f27a43 100644
--- a/Tests/Core/Registry/Registry.cs
+++ b/Tests/Core/Registry/Registry.cs
@@ -1,4 +1,5 @@
 using System.Transactions;
+using System.Collections.Generic;
 using CKAN;
 using CKAN.Versioning;
 using NUnit.Framework;
@@ -90,6 +91,98 @@ public void LatestAvailable()
             });
         }
 
+        [Test]
+        public void Available_NoDLCInstalled_ExcludesModulesDependingOnMH()
+        {
+            // Arrange
+            CkanModule DLCDepender = CkanModule.FromJson(@"{
+                ""identifier"": ""DLC-Depender"",
+                ""version"":    ""1.0.0"",
+                ""download"":   ""https://kerbalstuff.com/mod/269/Dogecoin%20Flag/download/1.01"",
+                ""depends"": [ {
+                    ""name"":""MakingHistory-DLC""
+                } ]
+            }");
+            registry.AddAvailable(DLCDepender);
+
+            // Act
+            List<CkanModule> avail = registry.Available(v0_24_2);
+
+            // Assert
+            Assert.IsFalse(avail.Contains(DLCDepender));
+        }
+
+        [Test]
+        public void Available_MHInstalled_IncludesModulesDependingOnMH()
+        {
+            // Arrange
+            registry.RegisterDlc("MakingHistory-DLC", new UnmanagedModuleVersion("1.1.0"));
+
+            CkanModule DLCDepender = CkanModule.FromJson(@"{
+                ""identifier"": ""DLC-Depender"",
+                ""version"":    ""1.0.0"",
+                ""download"":   ""https://kerbalstuff.com/mod/269/Dogecoin%20Flag/download/1.01"",
+                ""depends"": [ {
+                    ""name"":""MakingHistory-DLC""
+                } ]
+            }");
+            registry.AddAvailable(DLCDepender);
+
+            // Act
+            List<CkanModule> avail = registry.Available(v0_24_2);
+
+            // Assert
+            Assert.IsTrue(avail.Contains(DLCDepender));
+        }
+
+        [Test]
+        public void Available_MH110Installed_IncludesModulesDependingOnMH110()
+        {
+            // Arrange
+            registry.RegisterDlc("MakingHistory-DLC", new UnmanagedModuleVersion("1.1.0"));
+
+            CkanModule DLCDepender = CkanModule.FromJson(@"{
+                ""identifier"": ""DLC-Depender"",
+                ""version"":    ""1.0.0"",
+                ""download"":   ""https://kerbalstuff.com/mod/269/Dogecoin%20Flag/download/1.01"",
+                ""depends"": [ {
+                    ""name"": ""MakingHistory-DLC"",
+                    ""version"": ""1.1.0""
+                } ]
+            }");
+            registry.AddAvailable(DLCDepender);
+
+            // Act
+            List<CkanModule> avail = registry.Available(v0_24_2);
+
+            // Assert
+            Assert.IsTrue(avail.Contains(DLCDepender));
+        }
+
+        [Test]
+        public void Available_MH100Installed_ExcludesModulesDependingOnMH110()
+        {
+            // Arrange
+            registry.RegisterDlc("MakingHistory-DLC", new UnmanagedModuleVersion("1.0.0"));
+
+            CkanModule DLCDepender = CkanModule.FromJson(@"{
+                ""identifier"": ""DLC-Depender"",
+                ""version"":    ""1.0.0"",
+                ""download"":   ""https://kerbalstuff.com/mod/269/Dogecoin%20Flag/download/1.01"",
+                ""depends"": [ {
+                    ""name"": ""MakingHistory-DLC"",
+                    ""version"": ""1.1.0""
+                } ]
+            }");
+            registry.AddAvailable(DLCDepender);
+
+            // Act
+            List<CkanModule> avail = registry.Available(v0_24_2);
+
+            // Assert
+            Assert.IsFalse(avail.Contains(DLCDepender));
+        }
+
         [Test]
         public void TxEmbeddedCommit()
         {
@@ -186,4 +279,3 @@ public void TxAmbient()
         }
     }
 }
-