diff --git a/ReactCommon/jschelpers/JSCWrapper.h b/ReactCommon/jschelpers/JSCWrapper.h
index 03d2f3bdad..97fb661f7e 100644
--- a/ReactCommon/jschelpers/JSCWrapper.h
+++ b/ReactCommon/jschelpers/JSCWrapper.h
@@ -48,7 +48,7 @@ JSC_IMPORT JSValueRef JSPokeSamplingProfiler(JSContextRef);
  *
  * Version number indicating that bytecode is not supported by this runtime.
  */
-extern const int32_t JSNoBytecodeFileFormatVersion;
+__attribute__((visibility("default"))) extern const int32_t JSNoBytecodeFileFormatVersion;
 
 namespace facebook {
 namespace react {
diff --git a/ReactCommon/jschelpers/Unicode.h b/ReactCommon/jschelpers/Unicode.h
index cc1e25836b..a3e5fa9397 100644
--- a/ReactCommon/jschelpers/Unicode.h
+++ b/ReactCommon/jschelpers/Unicode.h
@@ -8,7 +8,7 @@
 namespace facebook {
 namespace react {
 namespace unicode {
-std::string utf16toUTF8(const uint16_t* utf16, size_t length) noexcept;
+__attribute__((visibility("default"))) std::string utf16toUTF8(const uint16_t* utf16, size_t length) noexcept;
 }
 }
 }
diff --git a/ReactCommon/jschelpers/Value.h b/ReactCommon/jschelpers/Value.h
index 10dfb18def..e0f1d0e087 100644
--- a/ReactCommon/jschelpers/Value.h
+++ b/ReactCommon/jschelpers/Value.h
@@ -233,9 +233,9 @@ private:
 
 class Value : public noncopyable {
 public:
-  Value(JSContextRef context, JSValueRef value);
-  Value(JSContextRef context, JSStringRef value);
-  Value(Value&&);
+  __attribute__((visibility("default"))) Value(JSContextRef context, JSValueRef value);
+  __attribute__((visibility("default"))) Value(JSContextRef context, JSStringRef value);
+  __attribute__((visibility("default"))) Value(Value&&);
 
   Value& operator=(Value&& other) {
     m_context = other.m_context;
@@ -316,10 +316,10 @@ public:
     return Value(ctx, JSC_JSValueMakeNull(ctx));
   }
 
-  std::string toJSONString(unsigned indent = 0) const;
-  static Value fromJSON(JSContextRef ctx, const String& json);
-  static JSValueRef fromDynamic(JSContextRef ctx, const folly::dynamic& value);
-  JSContextRef context() const;
+  __attribute__((visibility("default"))) std::string toJSONString(unsigned indent = 0) const;
+  __attribute__((visibility("default"))) static Value fromJSON(JSContextRef ctx, const String& json);
+  __attribute__((visibility("default"))) static JSValueRef fromDynamic(JSContextRef ctx, const folly::dynamic& value);
+  __attribute__((visibility("default"))) JSContextRef context() const;
 protected:
   JSContextRef m_context;
   JSValueRef m_value;