diff --git a/gfx/gl/GLContext.cpp b/gfx/gl/GLContext.cpp
index 72a7bea58b..d07b925ad5 100644
--- a/gfx/gl/GLContext.cpp
+++ b/gfx/gl/GLContext.cpp
@@ -454,6 +454,7 @@ GLContext::GLContext(CreateContextFlags flags, const SurfaceCaps& caps,
     mTopError(LOCAL_GL_NO_ERROR),
     mDebugFlags(ChooseDebugFlags(flags)),
     mSharedContext(sharedContext),
+    mSymbols{},
     mCaps(caps),
     mScreen(nullptr),
     mLockedSurface(nullptr),
@@ -519,7 +520,7 @@ GLContext::InitWithPrefix(const char* prefix, bool trygl)
 
     if (!InitWithPrefixImpl(prefix, trygl)) {
         // If initialization fails, zero the symbols to avoid hard-to-understand bugs.
-        mSymbols.Zero();
+        mSymbols = {};
         NS_WARNING("GLContext::InitWithPrefix failed!");
         return false;
     }
@@ -2205,7 +2206,7 @@ GLContext::MarkDestroyed()
     mReadTexImageHelper = nullptr;
 
     mIsDestroyed = true;
-    mSymbols.Zero();
+    mSymbols = {};
     if (MakeCurrent(true)) {
         mTexGarbageBin->GLContextTeardown();
     }
diff --git a/gfx/gl/GLContextSymbols.h b/gfx/gl/GLContextSymbols.h
index 61069e3f73..798e6cef5d 100644
--- a/gfx/gl/GLContextSymbols.h
+++ b/gfx/gl/GLContextSymbols.h
@@ -25,15 +25,9 @@
 namespace mozilla {
 namespace gl {
 
-struct GLContextSymbols
+struct GLContextSymbols final
 {
-    GLContextSymbols() {
-        Zero();
-    }
-
-    void Zero() {
-        memset(this, 0, sizeof(GLContextSymbols));
-    }
+    GLContextSymbols() = delete; // Initialize with {}.
 
     typedef void (GLAPIENTRY * PFNGLACTIVETEXTUREPROC) (GLenum texture);
     PFNGLACTIVETEXTUREPROC fActiveTexture;