diff --git a/upb/port/def.inc b/upb/port/def.inc
index 78cb5c781eb7b..a638526059bb2 100644
--- a/upb/port/def.inc
+++ b/upb/port/def.inc
@@ -721,7 +721,7 @@ Error, UINTPTR_MAX is undefined
   __asm__(".private_extern _" #to);      \
   __asm__(".set _" #to ", _" #from);
 
-#elif defined(__ELF__)
+#elif defined(__ELF__) || defined(__wasm__)
 
 // On ELF, weak aliases work properly, so we can have all weak MiniTables point
 // to the same empty singleton MiniTable. This reduces code size if many