diff --git a/cc/makevars.go b/cc/makevars.go
index a1e97a5..2a5c813 100644
--- a/cc/makevars.go
+++ b/cc/makevars.go
@@ -59,12 +59,12 @@
 		ctx.Strict("BOARD_VNDK_VERSION", "")
 	}
 
-	ctx.Strict("ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS", asanCflags)
-	ctx.Strict("ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS", asanLdflags)
-	ctx.Strict("ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES", asanLibs)
+	ctx.Strict("ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS", strings.Join(asanCflags, " "))
+	ctx.Strict("ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS", strings.Join(asanLdflags, " "))
+	ctx.Strict("ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES", strings.Join(asanLibs, " "))
 
-	ctx.Strict("CFI_EXTRA_CFLAGS", cfiCflags)
-	ctx.Strict("CFI_EXTRA_LDFLAGS", cfiLdflags)
+	ctx.Strict("CFI_EXTRA_CFLAGS", strings.Join(cfiCflags, " "))
+	ctx.Strict("CFI_EXTRA_LDFLAGS", strings.Join(cfiLdflags, " "))
 
 	ctx.Strict("DEFAULT_C_STD_VERSION", config.CStdVersion)
 	ctx.Strict("DEFAULT_CPP_STD_VERSION", config.CppStdVersion)