diff --git a/src/main/java/com/android/tools/r8/D8Command.java b/src/main/java/com/android/tools/r8/D8Command.java
index cf475fa..a34b8ac 100644
--- a/src/main/java/com/android/tools/r8/D8Command.java
+++ b/src/main/java/com/android/tools/r8/D8Command.java
@@ -395,7 +395,7 @@
     // Assert some of R8 optimizations are disabled.
     assert !internal.enableInlining;
     assert !internal.enableClassInlining;
-    assert !internal.enableHorizontalClassMerging;
+    assert !internal.enableStaticClassMerging;
     assert !internal.enableVerticalClassMerging;
     assert !internal.enableClassStaticizer;
     assert !internal.enableEnumValueOptimization;
diff --git a/src/main/java/com/android/tools/r8/L8Command.java b/src/main/java/com/android/tools/r8/L8Command.java
index 48f2f7a..cae584b 100644
--- a/src/main/java/com/android/tools/r8/L8Command.java
+++ b/src/main/java/com/android/tools/r8/L8Command.java
@@ -167,7 +167,7 @@
     // Assert some of R8 optimizations are disabled.
     assert !internal.enableInlining;
     assert !internal.enableClassInlining;
-    assert !internal.enableHorizontalClassMerging;
+    assert !internal.enableStaticClassMerging;
     assert !internal.enableVerticalClassMerging;
     assert !internal.enableClassStaticizer;
     assert !internal.enableEnumValueOptimization;
diff --git a/src/main/java/com/android/tools/r8/R8.java b/src/main/java/com/android/tools/r8/R8.java
index fa6c0f3..1f4c63a 100644
--- a/src/main/java/com/android/tools/r8/R8.java
+++ b/src/main/java/com/android/tools/r8/R8.java
@@ -504,7 +504,7 @@
 
       if (!isKotlinLibraryCompilationWithInlinePassThrough
           && options.getProguardConfiguration().isOptimizing()) {
-        if (options.enableHorizontalClassMerging) {
+        if (options.enableStaticClassMerging) {
           timing.begin("HorizontalStaticClassMerger");
           StaticClassMerger staticClassMerger =
               new StaticClassMerger(appViewWithLiveness, options, mainDexClasses);
diff --git a/src/main/java/com/android/tools/r8/R8Command.java b/src/main/java/com/android/tools/r8/R8Command.java
index 5abbc25..f2d182d 100644
--- a/src/main/java/com/android/tools/r8/R8Command.java
+++ b/src/main/java/com/android/tools/r8/R8Command.java
@@ -842,7 +842,7 @@
             ? LineNumberOptimization.ON
             : LineNumberOptimization.OFF;
 
-    assert internal.enableHorizontalClassMerging || !proguardConfiguration.isOptimizing();
+    assert internal.enableStaticClassMerging || !proguardConfiguration.isOptimizing();
     assert !internal.enableTreeShakingOfLibraryMethodOverrides;
     assert internal.enableVerticalClassMerging || !proguardConfiguration.isOptimizing();
     if (internal.debug) {
@@ -851,7 +851,7 @@
       internal.getProguardConfiguration().getKeepAttributes().localVariableTypeTable = true;
       internal.enableInlining = false;
       internal.enableClassInlining = false;
-      internal.enableHorizontalClassMerging = false;
+      internal.enableStaticClassMerging = false;
       internal.enableVerticalClassMerging = false;
       internal.enableClassStaticizer = false;
       internal.outline.enabled = false;
diff --git a/src/main/java/com/android/tools/r8/utils/InternalOptions.java b/src/main/java/com/android/tools/r8/utils/InternalOptions.java
index 6d85a4e..b55d0ac 100644
--- a/src/main/java/com/android/tools/r8/utils/InternalOptions.java
+++ b/src/main/java/com/android/tools/r8/utils/InternalOptions.java
@@ -184,7 +184,7 @@
     enableClassStaticizer = false;
     enableDevirtualization = false;
     enableLambdaMerging = false;
-    enableHorizontalClassMerging = false;
+    enableStaticClassMerging = false;
     enableVerticalClassMerging = false;
     enableEnumUnboxing = false;
     enableUninstantiatedTypeOptimization = false;
@@ -217,7 +217,7 @@
   public boolean enableFieldAssignmentTracker = true;
   public boolean enableFieldBitAccessAnalysis =
       System.getProperty("com.android.tools.r8.fieldBitAccessAnalysis") != null;
-  public boolean enableHorizontalClassMerging = true;
+  public boolean enableStaticClassMerging = true;
   public boolean enableVerticalClassMerging = true;
   public boolean enableArgumentRemoval = true;
   public boolean enableUnusedInterfaceRemoval = true;
diff --git a/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingVirtualInvokeTest.java b/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingVirtualInvokeTest.java
index cc4e99c..36bf030 100644
--- a/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingVirtualInvokeTest.java
+++ b/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingVirtualInvokeTest.java
@@ -111,7 +111,7 @@
             options -> {
               options.enableInlining = false;
               options.enableVerticalClassMerging = false;
-              options.enableHorizontalClassMerging = false;
+              options.enableStaticClassMerging = false;
               options.enableClassInlining = false;
             })
         .compile();