diff --git a/src/Graphics/OpenGLContext/GLSL/glsl_SpecialShadersFactory.cpp b/src/Graphics/OpenGLContext/GLSL/glsl_SpecialShadersFactory.cpp
index cb899bc6..6f4a367c 100644
--- a/src/Graphics/OpenGLContext/GLSL/glsl_SpecialShadersFactory.cpp
+++ b/src/Graphics/OpenGLContext/GLSL/glsl_SpecialShadersFactory.cpp
@@ -563,6 +563,8 @@ namespace glsl {
 
 		void setTextureSize(u32 _width, u32 _height) override
 		{
+			if (m_textureSizeLoc < 0)
+				return;
 			m_useProgram->useProgram(m_program);
 			glUniform2f(m_textureSizeLoc, (GLfloat)_width, (GLfloat)_height);
 			gDP.changed |= CHANGED_COMBINE;
diff --git a/src/TexrectDrawer.cpp b/src/TexrectDrawer.cpp
index 1f686abd..644477de 100644
--- a/src/TexrectDrawer.cpp
+++ b/src/TexrectDrawer.cpp
@@ -79,6 +79,7 @@ void TexrectDrawer::init()
 
 	m_programTex.reset(gfxContext.createTexrectDrawerDrawShader());
 	m_programClear.reset(gfxContext.createTexrectDrawerClearShader());
+	m_programTex->setTextureSize(m_pTexture->realWidth, m_pTexture->realHeight);
 
 	m_vecRectCoords.reserve(256);
 }