diff --git a/internal/graphicsdriver/opengl/gles/default.go b/internal/graphicsdriver/opengl/gles/default.go
index dd8a9989f..2bd7d8b2b 100644
--- a/internal/graphicsdriver/opengl/gles/default.go
+++ b/internal/graphicsdriver/opengl/gles/default.go
@@ -30,6 +30,8 @@ package gles
 //   #define GLES_SILENCE_DEPRECATION
 //   #include <OpenGLES/ES2/glext.h>
 // #endif
+//
+// #include <stdlib.h>
 import "C"
 
 import (
@@ -54,8 +56,8 @@ func (DefaultContext) AttachShader(program uint32, shader uint32) {
 }
 
 func (DefaultContext) BindAttribLocation(program uint32, index uint32, name string) {
-	s, free := cString(name)
-	defer free()
+	s := C.CString(name)
+	defer C.free(unsafe.Pointer(s))
 	C.glBindAttribLocation(C.GLuint(program), C.GLuint(index), (*C.GLchar)(unsafe.Pointer(s)))
 }
 
@@ -245,8 +247,8 @@ func (DefaultContext) GetShaderPrecisionFormat(shadertype uint32, precisiontype
 }
 
 func (DefaultContext) GetUniformLocation(program uint32, name string) int32 {
-	s, free := cString(name)
-	defer free()
+	s := C.CString(name)
+	defer C.free(unsafe.Pointer(s))
 	return int32(C.glGetUniformLocation(C.GLuint(program), (*C.GLchar)(unsafe.Pointer(s))))
 }
 
@@ -289,7 +291,7 @@ func (DefaultContext) Scissor(x, y, width, height int32) {
 func (DefaultContext) ShaderSource(shader uint32, xstring string) {
 	s, free := cStringPtr(xstring)
 	defer free()
-	C.glShaderSource(C.GLuint(shader), 1, (**C.GLchar)(unsafe.Pointer(s)), nil)
+	C.glShaderSource(C.GLuint(shader), 1, (**C.GLchar)(s), nil)
 }
 
 func (DefaultContext) StencilFunc(func_ uint32, ref int32, mask uint32) {
diff --git a/internal/graphicsdriver/opengl/gles/str.go b/internal/graphicsdriver/opengl/gles/str.go
index 74b1506b0..3ec6be9ea 100644
--- a/internal/graphicsdriver/opengl/gles/str.go
+++ b/internal/graphicsdriver/opengl/gles/str.go
@@ -24,17 +24,12 @@ import (
 	"unsafe"
 )
 
-func cString(str string) (uintptr, func()) {
-	ptr := C.CString(str)
-	return uintptr(unsafe.Pointer(ptr)), func() { C.free(unsafe.Pointer(ptr)) }
-}
-
-func cStringPtr(str string) (uintptr, func()) {
-	s, free := cString(str)
+func cStringPtr(str string) (unsafe.Pointer, func()) {
+	s := C.CString(str)
 	ptr := C.malloc(C.size_t(unsafe.Sizeof((*int)(nil))))
-	*(*uintptr)(ptr) = s
-	return uintptr(ptr), func() {
-		free()
+	*(*unsafe.Pointer)(ptr) = unsafe.Pointer(s)
+	return ptr, func() {
+		C.free(unsafe.Pointer(s))
 		C.free(ptr)
 	}
 }