diff --git a/plugins/GSdx/GLLoader.cpp b/plugins/GSdx/GLLoader.cpp
index dd95b1ece2..ac5437897f 100644
--- a/plugins/GSdx/GLLoader.cpp
+++ b/plugins/GSdx/GLLoader.cpp
@@ -151,6 +151,7 @@ PFNGLCREATEPROGRAMPIPELINESPROC        glCreateProgramPipelines            = NUL
 
 PFNGLCLIPCONTROLPROC                   glClipControl                       = NULL;
 PFNGLTEXTUREBARRIERPROC                glTextureBarrier                    = NULL;
+PFNGLGETTEXTURESUBIMAGEPROC            glGetTextureSubImage                = NULL;
 
 namespace ReplaceGL {
 	void APIENTRY BlendEquationSeparateiARB(GLuint buf, GLenum modeRGB, GLenum modeAlpha)
@@ -186,6 +187,7 @@ namespace GLLoader {
 	bool found_geometry_shader = true; // we require GL3.3 so geometry must be supported by default
 	bool found_GL_EXT_texture_filter_anisotropic = false;
 	bool found_GL_ARB_clear_texture = false; // Miss AMD Mesa (otherwise seems SW)
+	bool found_GL_ARB_get_texture_sub_image = false; // Not yet used
 	// DX11 GPU
 	bool found_GL_ARB_draw_buffers_blend = false; // Not supported on AMD R600 (80 nm class chip, HD2900). Nvidia requires FERMI. Intel SB
 	bool found_GL_ARB_gpu_shader5 = false; // Require IvyBridge
@@ -300,6 +302,7 @@ namespace GLLoader {
 				if (ext.compare("GL_ARB_direct_state_access") == 0) found_GL_ARB_direct_state_access = true;
 				if (ext.compare("GL_ARB_clip_control") == 0) found_GL_ARB_clip_control = true;
 				if (ext.compare("GL_ARB_texture_barrier") == 0) found_GL_ARB_texture_barrier = true;
+				if (ext.compare("GL_ARB_get_texture_sub_image") == 0) found_GL_ARB_get_texture_sub_image = true;
 
 				//fprintf(stderr, "DEBUG ext: %s\n", ext.c_str());
 			}
@@ -329,6 +332,7 @@ namespace GLLoader {
 		status &= status_and_override(found_GL_ARB_clip_control, "GL_ARB_clip_control", true);
 		status &= status_and_override(found_GL_ARB_direct_state_access, "GL_ARB_direct_state_access", true);
 		status &= status_and_override(found_GL_ARB_texture_barrier, "GL_ARB_texture_barrier", true);
+		status &= status_and_override(found_GL_ARB_get_texture_sub_image, "GL_ARB_get_texture_sub_image");
 
 #ifdef _WIN32
 		if (status) {
diff --git a/plugins/GSdx/GLLoader.h b/plugins/GSdx/GLLoader.h
index f5eb9eec7a..dde71426e2 100644
--- a/plugins/GSdx/GLLoader.h
+++ b/plugins/GSdx/GLLoader.h
@@ -326,6 +326,7 @@ extern PFNGLCREATEPROGRAMPIPELINESPROC          glCreateProgramPipelines;
 
 extern PFNGLCLIPCONTROLPROC                     glClipControl;
 extern PFNGLTEXTUREBARRIERPROC                  glTextureBarrier;
+extern PFNGLGETTEXTURESUBIMAGEPROC              glGetTextureSubImage;
 
 namespace GLLoader {
 	bool check_gl_version(int major, int minor);
diff --git a/plugins/GSdx/GSTextureOGL.cpp b/plugins/GSdx/GSTextureOGL.cpp
index 341367a97d..1b287b6772 100644
--- a/plugins/GSdx/GSTextureOGL.cpp
+++ b/plugins/GSdx/GSTextureOGL.cpp
@@ -365,7 +365,7 @@ bool GSTextureOGL::Map(GSMap& m, const GSVector4i* _r)
 		// Maybe it is as good as the code below. I don't know
 		// With openGL 4.5 you can use glGetTextureSubImage
 
-		glGetTextureSubImage(m_texture_id, GL_TEX_LEVEL_0, r.x, r.y, 0, r.width(), r.height(), 0, m_int_format, m_int_type, m_size.x * m_size.y * 4, m_local_buffer);
+		glGetTextureSubImage(m_texture_id, GL_TEX_LEVEL_0, r.x, r.y, 0, r.width(), r.height(), 1, m_int_format, m_int_type, m_size.x * m_size.y * 4, m_local_buffer);
 #else
 
 		// Bind the texture to the read framebuffer to avoid any disturbance
diff --git a/plugins/GSdx/GSWnd.cpp b/plugins/GSdx/GSWnd.cpp
index 324dbc9f73..521a0a9f08 100644
--- a/plugins/GSdx/GSWnd.cpp
+++ b/plugins/GSdx/GSWnd.cpp
@@ -160,4 +160,5 @@ void GSWndGL::PopulateGlFunction()
 
 	GL_EXT_LOAD(glClipControl);
 	GL_EXT_LOAD(glTextureBarrier);
+	GL_EXT_LOAD_OPT(glGetTextureSubImage);
 }