diff --git a/bpf_progs/netd.h b/bpf_progs/netd.h
index 64ed633..098147f 100644
--- a/bpf_progs/netd.h
+++ b/bpf_progs/netd.h
@@ -178,7 +178,7 @@
 #endif // __cplusplus
 
 // LINT.IfChange(match_type)
-enum UidOwnerMatchType {
+enum UidOwnerMatchType : uint32_t {
     NO_MATCH = 0,
     HAPPY_BOX_MATCH = (1 << 0),
     PENALTY_BOX_MATCH = (1 << 1),
@@ -196,14 +196,14 @@
 };
 // LINT.ThenChange(../framework/src/android/net/BpfNetMapsConstants.java)
 
-enum BpfPermissionMatch {
+enum BpfPermissionMatch : uint8_t {
     BPF_PERMISSION_INTERNET = 1 << 2,
     BPF_PERMISSION_UPDATE_DEVICE_STATS = 1 << 3,
 };
 // In production we use two identical stats maps to record per uid stats and
 // do swap and clean based on the configuration specified here. The statsMapType
 // value in configuration map specified which map is currently in use.
-enum StatsMapType {
+enum StatsMapType : uint32_t {
     SELECT_MAP_A,
     SELECT_MAP_B,
 };