diff --git a/internal/graphicsdriver/opengl/gl/procaddr_darwin.go b/internal/graphicsdriver/opengl/gl/procaddr_darwin.go
index 4bed949c4..ada2dbd48 100644
--- a/internal/graphicsdriver/opengl/gl/procaddr_darwin.go
+++ b/internal/graphicsdriver/opengl/gl/procaddr_darwin.go
@@ -40,10 +40,7 @@ func (c *defaultContext) init() error {
 
 func (c *defaultContext) getProcAddress(name string) uintptr {
 	if c.isES {
-		const ext = "EXT"
-		if strings.HasSuffix(name, ext) {
-			name = name[:len(name)-len(ext)]
-		}
+		name = strings.TrimSuffix(name, "EXT")
 	}
 	return purego.Dlsym(opengl, name)
 }
diff --git a/internal/graphicsdriver/opengl/gl/procaddr_others.go b/internal/graphicsdriver/opengl/gl/procaddr_others.go
index 57d34e1c0..064f883af 100644
--- a/internal/graphicsdriver/opengl/gl/procaddr_others.go
+++ b/internal/graphicsdriver/opengl/gl/procaddr_others.go
@@ -106,9 +106,8 @@ func getProcAddressGL(name string) unsafe.Pointer {
 }
 
 func getProcAddressGLES(name string) unsafe.Pointer {
-	const ext = "EXT"
 	if strings.HasSuffix(name, ext) {
-		name = name[:len(name)-len(ext)]
+		name = strings.TrimSuffix(name, "EXT")
 	}
 	cname := C.CString(name)
 	defer C.free(unsafe.Pointer(cname))