diff --git a/Tethering/apex/Android.bp b/Tethering/apex/Android.bp
index 30bdf37..4bae221 100644
--- a/Tethering/apex/Android.bp
+++ b/Tethering/apex/Android.bp
@@ -103,9 +103,9 @@
         "dscpPolicy.o",
         "netd.o",
         "offload.o",
-        "offload@btf.o",
+        "offload@mainline.o",
         "test.o",
-        "test@btf.o",
+        "test@mainline.o",
     ],
     apps: [
         "ServiceConnectivityResources",
diff --git a/bpf_progs/Android.bp b/bpf_progs/Android.bp
index 674cd98..1958aa8 100644
--- a/bpf_progs/Android.bp
+++ b/bpf_progs/Android.bp
@@ -94,13 +94,13 @@
 }
 
 bpf {
-    name: "offload@btf.o",
-    srcs: ["offload@btf.c"],
+    name: "offload@mainline.o",
+    srcs: ["offload@mainline.c"],
     btf: true,
     cflags: [
         "-Wall",
         "-Werror",
-        "-DBTF",
+        "-DMAINLINE",
     ],
 }
 
@@ -114,13 +114,13 @@
 }
 
 bpf {
-    name: "test@btf.o",
-    srcs: ["test@btf.c"],
+    name: "test@mainline.o",
+    srcs: ["test@mainline.c"],
     btf: true,
     cflags: [
         "-Wall",
         "-Werror",
-        "-DBTF",
+        "-DMAINLINE",
     ],
 }
 
diff --git a/bpf_progs/offload.c b/bpf_progs/offload.c
index 90f96a1..dd59dca 100644
--- a/bpf_progs/offload.c
+++ b/bpf_progs/offload.c
@@ -24,16 +24,16 @@
 #define __kernel_udphdr udphdr
 #include <linux/udp.h>
 
-#ifdef BTF
+#ifdef MAINLINE
 // BTF is incompatible with bpfloaders < v0.10, hence for S (v0.2) we must
 // ship a different file than for later versions, but we need bpfloader v0.25+
 // for obj@ver.o support
 #define BPFLOADER_MIN_VER BPFLOADER_OBJ_AT_VER_VERSION
-#else /* BTF */
+#else /* MAINLINE */
 // The resulting .o needs to load on the Android S bpfloader
 #define BPFLOADER_MIN_VER BPFLOADER_S_VERSION
 #define BPFLOADER_MAX_VER BPFLOADER_OBJ_AT_VER_VERSION
-#endif /* BTF */
+#endif /* MAINLINE */
 
 // Warning: values other than AID_ROOT don't work for map uid on BpfLoader < v0.21
 #define TETHERING_UID AID_ROOT
diff --git a/bpf_progs/offload@btf.c b/bpf_progs/offload@mainline.c
similarity index 100%
rename from bpf_progs/offload@btf.c
rename to bpf_progs/offload@mainline.c
diff --git a/bpf_progs/test.c b/bpf_progs/test.c
index 70b08b7..e2b8ea5 100644
--- a/bpf_progs/test.c
+++ b/bpf_progs/test.c
@@ -18,16 +18,16 @@
 #include <linux/in.h>
 #include <linux/ip.h>
 
-#ifdef BTF
+#ifdef MAINLINE
 // BTF is incompatible with bpfloaders < v0.10, hence for S (v0.2) we must
 // ship a different file than for later versions, but we need bpfloader v0.25+
 // for obj@ver.o support
 #define BPFLOADER_MIN_VER BPFLOADER_OBJ_AT_VER_VERSION
-#else /* BTF */
+#else /* MAINLINE */
 // The resulting .o needs to load on the Android S bpfloader
 #define BPFLOADER_MIN_VER BPFLOADER_S_VERSION
 #define BPFLOADER_MAX_VER BPFLOADER_OBJ_AT_VER_VERSION
-#endif /* BTF */
+#endif /* MAINLINE */
 
 // Warning: values other than AID_ROOT don't work for map uid on BpfLoader < v0.21
 #define TETHERING_UID AID_ROOT
diff --git a/bpf_progs/test@btf.c b/bpf_progs/test@mainline.c
similarity index 100%
rename from bpf_progs/test@btf.c
rename to bpf_progs/test@mainline.c