diff --git a/src/main/java/build/buf/protovalidate/RuleCache.java b/src/main/java/build/buf/protovalidate/RuleCache.java
index 44497dae..8cec0c0d 100644
--- a/src/main/java/build/buf/protovalidate/RuleCache.java
+++ b/src/main/java/build/buf/protovalidate/RuleCache.java
@@ -144,7 +144,7 @@ List<CompiledProgram> compile(
       FieldDescriptor ruleFieldDesc,
       Message message)
       throws CompilationException {
-    List<CelRule> celRules = descriptorMap.get(fieldDescriptor);
+    List<CelRule> celRules = descriptorMap.get(ruleFieldDesc);
     if (celRules != null) {
       return celRules;
     }