diff --git a/src/backend/gl/gl_common.c b/src/backend/gl/gl_common.c
index 9710baa..eb13f44 100644
--- a/src/backend/gl/gl_common.c
+++ b/src/backend/gl/gl_common.c
@@ -1358,8 +1358,9 @@ static inline void gl_image_decouple(backend_t *base, struct gl_image *img) {
 
 static void gl_image_apply_alpha(backend_t *base, struct gl_image *img,
                                  const region_t *reg_op, double alpha) {
-	glBlendFunc(GL_ONE, GL_CONSTANT_COLOR);
-	glBlendColor((GLclampf)alpha, (GLclampf)alpha, (GLclampf)alpha, (GLclampf)alpha);
+	// Result color = 0 (GL_ZERO) + alpha (GL_CONSTANT_ALPHA) * original color
+	glBlendFunc(GL_ZERO, GL_CONSTANT_ALPHA);
+	glBlendColor(0, 0, 0, (GLclampf)alpha);
 	GLuint fbo;
 	glGenFramebuffers(1, &fbo);
 	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);