diff --git a/build-tools/build-infra/src/main/groovy/lucene.validation.error-prone.gradle b/build-tools/build-infra/src/main/groovy/lucene.validation.error-prone.gradle
index b667e9e385d7..f20204120446 100644
--- a/build-tools/build-infra/src/main/groovy/lucene.validation.error-prone.gradle
+++ b/build-tools/build-infra/src/main/groovy/lucene.validation.error-prone.gradle
@@ -77,12 +77,6 @@ allprojects { prj ->
       }
 
       tasks.withType(JavaCompile).configureEach { task ->
-        // Disable errorprone on the MR-JAR tasks
-        if (task.name ==~ /compileMain\d+Java/) {
-          options.errorprone.enabled = false
-          return
-        }
-
         // Exclude certain files (generated ones, mostly).
         switch (project.path) {
           case ":lucene:core":
diff --git a/lucene/core/src/java24/org/apache/lucene/internal/vectorization/MemorySegmentPostingDecodingUtil.java b/lucene/core/src/java24/org/apache/lucene/internal/vectorization/MemorySegmentPostingDecodingUtil.java
index c4a3f8232704..b2e248ad7c2d 100644
--- a/lucene/core/src/java24/org/apache/lucene/internal/vectorization/MemorySegmentPostingDecodingUtil.java
+++ b/lucene/core/src/java24/org/apache/lucene/internal/vectorization/MemorySegmentPostingDecodingUtil.java
@@ -47,6 +47,7 @@ private static void shift(
   }
 
   @Override
+  @SuppressWarnings("NarrowCalculation") // count * 4 won't overflow integer here
   public void splitInts(
       int count, int[] b, int bShift, int dec, int bMask, int[] c, int cIndex, int cMask)
       throws IOException {