diff --git a/src/bitmap.cpp b/src/bitmap.cpp
index 99706c4..fb2e000 100644
--- a/src/bitmap.cpp
+++ b/src/bitmap.cpp
@@ -519,7 +519,7 @@ void Bitmap::drawText(const IntRect &rect, const char *str, int align)
 	}
 
 	gState->bindTex();
-	TEX::uploadSubImage(0, 0, txtSurf->w, txtSurf->h, txtSurf->pixels, GL_BGRA);
+	TEX::uploadSubImage(0, 0, txtSurf->w, txtSurf->h, txtSurf->pixels, GL_BGRA_EXT);
 	TEX::setSmooth(true);
 
 	Quad &quad = gState->gpQuad();
diff --git a/src/gl-util.h b/src/gl-util.h
index 6cec2c0..33d16f2 100644
--- a/src/gl-util.h
+++ b/src/gl-util.h
@@ -166,26 +166,26 @@ namespace FBO
 	inline ID gen()
 	{
 		ID id;
-		glGenFramebuffers(1, &id.gl);
+		glGenFramebuffersEXT(1, &id.gl);
 
 		return id;
 	}
 
 	inline void del(ID id)
 	{
-		glDeleteFramebuffers(1, &id.gl);
+		glDeleteFramebuffersEXT(1, &id.gl);
 	}
 
 	inline void bind(ID id, Mode mode = Default)
 	{
 		static const GLenum modes[] =
 		{
-			GL_DRAW_FRAMEBUFFER,
-			GL_READ_FRAMEBUFFER,
-			GL_FRAMEBUFFER
+			GL_DRAW_FRAMEBUFFER_EXT,
+			GL_READ_FRAMEBUFFER_EXT,
+			GL_FRAMEBUFFER_EXT
 		};
 
-		glBindFramebuffer(modes[mode], id.gl);
+		glBindFramebufferEXT(modes[mode], id.gl);
 	}
 
 	inline void unbind(Mode mode = Default)
@@ -195,12 +195,12 @@ namespace FBO
 
 	inline void setTarget(TEX::ID target, unsigned colorAttach = 0)
 	{
-		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + colorAttach, GL_TEXTURE_2D, target.gl, 0);
+		glFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + colorAttach, GL_TEXTURE_2D, target.gl, 0);
 	}
 
 	inline void setTarget(RBO::ID target, unsigned colorAttach = 0)
 	{
-		glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + colorAttach, GL_RENDERBUFFER, target.gl);
+		glFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + colorAttach, GL_RENDERBUFFER, target.gl);
 	}
 
 	inline void blit(int srcX, int srcY,
@@ -208,9 +208,9 @@ namespace FBO
 	                 int dstX, int dstY,
 	                 int dstW, int dstH)
 	{
-		glBlitFramebuffer(srcX, srcY, srcX+srcW, srcY+srcH,
-		                  dstX, dstY, dstX+dstW, dstY+dstH,
-		                  GL_COLOR_BUFFER_BIT, GL_NEAREST);
+		glBlitFramebufferEXT(srcX, srcY, srcX+srcW, srcY+srcH,
+		                     dstX, dstY, dstX+dstW, dstY+dstH,
+		                     GL_COLOR_BUFFER_BIT, GL_NEAREST);
 	}
 
 	inline void blit(int srcX, int srcY,
diff --git a/src/glstate.cpp b/src/glstate.cpp
index dd47260..229120a 100644
--- a/src/glstate.cpp
+++ b/src/glstate.cpp
@@ -69,21 +69,21 @@ void GLBlendMode::apply(const BlendType &value)
 
 	case BlendNormal :
 		glBlendEquation(GL_FUNC_ADD);
-		glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA,
-		                    GL_ONE,       GL_ONE_MINUS_SRC_ALPHA);
+		glBlendFuncSeparateEXT(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA,
+		                       GL_ONE,       GL_ONE_MINUS_SRC_ALPHA);
 		break;
 
 	case BlendAddition :
 		glBlendEquation(GL_FUNC_ADD);
-		glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE,
-		                    GL_ONE,       GL_ONE);
+		glBlendFuncSeparateEXT(GL_SRC_ALPHA, GL_ONE,
+		                       GL_ONE,       GL_ONE);
 		break;
 
 	case BlendSubstraction :
 		// FIXME Alpha calculation is untested
-		glBlendEquation(GL_FUNC_REVERSE_SUBTRACT);
-		glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE,
-		                    GL_ONE,       GL_ONE);
+		glBlendEquation(GL_FUNC_REVERSE_SUBTRACT_EXT);
+		glBlendFuncSeparateEXT(GL_SRC_ALPHA, GL_ONE,
+		                       GL_ONE,       GL_ONE);
 		break;
 	}
 }