diff --git a/vlib/sync/channels.v b/vlib/sync/channels.v
index bda7135421..61247233db 100644
--- a/vlib/sync/channels.v
+++ b/vlib/sync/channels.v
@@ -3,11 +3,12 @@ module sync
 import time
 import rand
 
-#flag windows -I @VROOT/thirdparty/stdatomic/win
-#flag linux -I @VROOT/thirdparty/stdatomic/nix
-#flag darwin -I @VROOT/thirdparty/stdatomic/nix
-#flag freebsd -I @VROOT/thirdparty/stdatomic/nix
-#flag solaris -I @VROOT/thirdparty/stdatomic/nix
+
+$if windows {
+	#flag -I @VROOT/thirdparty/stdatomic/win
+} $else {
+	#flag -I @VROOT/thirdparty/stdatomic/nix
+}
 
 $if linux {
 	$if tinyc {
@@ -24,8 +25,7 @@ $if linux {
 }
 
 #include <atomic.h>
-
-// the following functions are actually generic in C
+// The following functions are actually generic in C
 fn C.atomic_load_ptr(voidptr) voidptr
 fn C.atomic_store_ptr(voidptr, voidptr)
 fn C.atomic_compare_exchange_weak_ptr(voidptr, voidptr, voidptr) bool
diff --git a/vlib/sync/sync_default.c.v b/vlib/sync/sync_default.c.v
index 244d8dd367..37d0c27226 100644
--- a/vlib/sync/sync_default.c.v
+++ b/vlib/sync/sync_default.c.v
@@ -5,7 +5,12 @@ module sync
 
 import time
 
-#flag -lpthread
+// There's no additional linking (-lpthread) needed for Android.
+// See https://stackoverflow.com/a/31277163/1904615
+$if !android {
+	#flag -lpthread
+}
+
 #include <semaphore.h>
 
 [trusted]