diff --git a/contexthub/1.0/default/Contexthub.cpp b/contexthub/1.0/default/Contexthub.cpp
index bf45900..3626a09 100644
--- a/contexthub/1.0/default/Contexthub.cpp
+++ b/contexthub/1.0/default/Contexthub.cpp
@@ -440,18 +440,15 @@
     // Data from the nanoapp header is passed through HIDL as explicit fields,
     // but the legacy HAL expects it prepended to the binary, therefore we must
     // reconstruct it here prior to passing to the legacy HAL.
-    uint32_t targetChreApiVersion =
-        (appBinary.targetChreApiMajorVersion << 24) |
-        (appBinary.targetChreApiMinorVersion << 16);
     const struct nano_app_binary_t header = {
         .header_version = htole32(1),
-        .magic          = htole32(NANOAPP_MAGIC),
-        .app_id.id      = htole64(appBinary.appId),
-        .app_version    = htole32(appBinary.appVersion),
-        .flags          = htole32(appBinary.flags),
-        .hw_hub_type    = htole64(0),
-        .reserved[0]    = htole32(targetChreApiVersion),
-        .reserved[1]    = 0,
+        .magic = htole32(NANOAPP_MAGIC),
+        .app_id.id = htole64(appBinary.appId),
+        .app_version = htole32(appBinary.appVersion),
+        .flags = htole32(appBinary.flags),
+        .hw_hub_type = htole64(0),
+        .target_chre_api_major_version = appBinary.targetChreApiMajorVersion,
+        .target_chre_api_minor_version = appBinary.targetChreApiMinorVersion,
     };
     const uint8_t *headerBytes = reinterpret_cast<const uint8_t *>(&header);