diff --git a/tools/stats_log_api_gen/Collation.cpp b/tools/stats_log_api_gen/Collation.cpp
index 8bccd71..aa356f1 100644
--- a/tools/stats_log_api_gen/Collation.cpp
+++ b/tools/stats_log_api_gen/Collation.cpp
@@ -237,6 +237,16 @@
         errorCount++;
         continue;
     }
+
+    if (field->is_repeated() &&
+        !(javaType == JAVA_TYPE_ATTRIBUTION_CHAIN || javaType == JAVA_TYPE_KEY_VALUE_PAIR)) {
+        print_error(field,
+                    "Repeated fields are not supported in atoms. Please make field %s not "
+                    "repeated.\n",
+                    field->name().c_str());
+        errorCount++;
+        continue;
+    }
   }
 
   // Check that if there's an attribution chain, it's at position 1.
diff --git a/tools/stats_log_api_gen/test.proto b/tools/stats_log_api_gen/test.proto
index b892194..eab622d 100644
--- a/tools/stats_log_api_gen/test.proto
+++ b/tools/stats_log_api_gen/test.proto
@@ -41,21 +41,20 @@
 
 message AllTypesAtom {
   repeated android.os.statsd.AttributionNode attribution_chain = 1;
-  optional double double_field = 2;
-  optional float float_field = 3;
-  optional int64 int64_field = 4;
-  optional uint64 uint64_field = 5;
-  optional int32 int32_field = 6;
-  optional fixed64 fixed64_field = 7;
-  optional fixed32 fixed32_field = 8;
-  optional bool bool_field = 9;
-  optional string string_field = 10;
-  optional uint32 uint32_field = 11;
-  optional AnEnum enum_field = 12;
-  optional sfixed32 sfixed32_field = 13;
-  optional sfixed64 sfixed64_field = 14;
-  optional sint32 sint32_field = 15;
-  optional sint64 sint64_field = 16;
+  optional float float_field = 2;
+  optional int64 int64_field = 3;
+  optional uint64 uint64_field = 4;
+  optional int32 int32_field = 5;
+  optional fixed64 fixed64_field = 6;
+  optional fixed32 fixed32_field = 7;
+  optional bool bool_field = 8;
+  optional string string_field = 9;
+  optional uint32 uint32_field = 10;
+  optional AnEnum enum_field = 11;
+  optional sfixed32 sfixed32_field = 12;
+  optional sfixed64 sfixed64_field = 13;
+  optional sint32 sint32_field = 14;
+  optional sint64 sint64_field = 15;
 }
 
 message Event {
@@ -70,6 +69,8 @@
 message BadTypesAtom {
     optional IntAtom bad_int_atom = 1;
     optional bytes bad_bytes = 2;
+    repeated int32 repeated_field = 3;
+    optional double double_field = 4;
 }
 
 message BadTypesEvent {
diff --git a/tools/stats_log_api_gen/test_collation.cpp b/tools/stats_log_api_gen/test_collation.cpp
index bcf18ae..a972e23 100644
--- a/tools/stats_log_api_gen/test_collation.cpp
+++ b/tools/stats_log_api_gen/test_collation.cpp
@@ -98,7 +98,6 @@
     EXPECT_SET_CONTAINS_SIGNATURE(
         atoms.signatures_to_modules,
         JAVA_TYPE_ATTRIBUTION_CHAIN, // AttributionChain
-        JAVA_TYPE_DOUBLE,            // double
         JAVA_TYPE_FLOAT,             // float
         JAVA_TYPE_LONG,              // int64
         JAVA_TYPE_LONG,              // uint64
@@ -157,13 +156,13 @@
 }
 
 /**
- * Test that atoms that have non-primitive types are rejected.
+ * Test that atoms that have non-primitive types or repeated fields are rejected.
  */
 TEST(CollationTest, FailOnBadTypes) {
     Atoms atoms;
     int errorCount = collate_atoms(BadTypesEvent::descriptor(), &atoms);
 
-    EXPECT_EQ(2, errorCount);
+    EXPECT_EQ(4, errorCount);
 }
 
 /**