diff --git a/package/lean/shadowsocksr-libev/patches/990-not-defined-errors-on-gcc10.patch b/package/lean/shadowsocksr-libev/patches/990-not-defined-errors-on-gcc10.patch
new file mode 100644
index 000000000..7a480f12b
--- /dev/null
+++ b/package/lean/shadowsocksr-libev/patches/990-not-defined-errors-on-gcc10.patch
@@ -0,0 +1,24 @@
+diff --git a/src/http.h b/src/http.h
+index 914815a..e312dd3 100644
+--- a/src/http.h
++++ b/src/http.h
+@@ -29,6 +29,6 @@
+ #include <stdio.h>
+ #include "protocol.h"
+ 
+-const protocol_t *const http_protocol;
++extern const protocol_t *const http_protocol;
+ 
+ #endif
+diff --git a/src/tls.h b/src/tls.h
+index 3998913..ddbee11 100644
+--- a/src/tls.h
++++ b/src/tls.h
+@@ -28,6 +28,6 @@
+ 
+ #include "protocol.h"
+ 
+-const protocol_t *const tls_protocol;
++extern const protocol_t *const tls_protocol;
+ 
+ #endif