diff --git a/platform/javascript/detect.py b/platform/javascript/detect.py
index e76dc88e9..9a4f7803f 100644
--- a/platform/javascript/detect.py
+++ b/platform/javascript/detect.py
@@ -195,6 +195,8 @@ def configure(env):
             sys.exit(255)
         env.Append(CCFLAGS=["-s", "RELOCATABLE=1"])
         env.Append(LINKFLAGS=["-s", "RELOCATABLE=1"])
+        # Weak symbols are broken upstream: https://github.com/emscripten-core/emscripten/issues/12819
+        env.Append(CPPDEFINES=["ZSTD_HAVE_WEAK_SYMBOLS=0"])
         env.extra_suffix = ".gdnative" + env.extra_suffix
 
     # Reduce code size by generating less support code (e.g. skip NodeJS support).