diff --git a/video/out/opengl/hwdec_vdpau.c b/video/out/opengl/hwdec_vdpau.c
index 7f61134376..f0bc4a6cdd 100644
--- a/video/out/opengl/hwdec_vdpau.c
+++ b/video/out/opengl/hwdec_vdpau.c
@@ -76,14 +76,14 @@ static void destroy_objects(struct gl_hwdec *hw)
     }
     p->vdp_surface = VDP_INVALID_HANDLE;
 
-    glCheckError(gl, hw->log, "Before uninitializing OpenGL interop");
+    gl_check_error(gl, hw->log, "Before uninitializing OpenGL interop");
 
     if (p->vdpgl_initialized)
         gl->VDPAUFiniNV();
 
     p->vdpgl_initialized = false;
 
-    glCheckError(gl, hw->log, "After uninitializing OpenGL interop");
+    gl_check_error(gl, hw->log, "After uninitializing OpenGL interop");
 }
 
 static void destroy(struct gl_hwdec *hw)
@@ -164,7 +164,7 @@ static int reinit(struct gl_hwdec *hw, struct mp_image_params *params)
 
     gl->VDPAUSurfaceAccessNV(p->vdpgl_surface, GL_READ_ONLY);
 
-    glCheckError(gl, hw->log, "After initializing vdpau OpenGL interop");
+    gl_check_error(gl, hw->log, "After initializing vdpau OpenGL interop");
 
     params->imgfmt = IMGFMT_RGB0;
 
diff --git a/video/out/opengl/utils.c b/video/out/opengl/utils.c
index afc768b0d2..3d41f0693c 100644
--- a/video/out/opengl/utils.c
+++ b/video/out/opengl/utils.c
@@ -40,7 +40,7 @@ static const char *gl_error_to_string(GLenum error)
     }
 }
 
-void glCheckError(GL *gl, struct mp_log *log, const char *info)
+void gl_check_error(GL *gl, struct mp_log *log, const char *info)
 {
     for (;;) {
         GLenum error = gl->GetError();
@@ -100,7 +100,7 @@ void gl_upload_tex(GL *gl, GLenum target, GLenum format, GLenum type,
     gl->PixelStorei(GL_UNPACK_ALIGNMENT, 4);
 }
 
-mp_image_t *glGetWindowScreenshot(GL *gl)
+mp_image_t *gl_read_window_contents(GL *gl)
 {
     if (gl->es)
         return NULL; // ES can't read from front buffer
@@ -307,7 +307,7 @@ bool fbotex_change(struct fbotex *fbo, GL *gl, struct mp_log *log, int w, int h,
 
     fbotex_set_filter(fbo, filter ? filter : GL_LINEAR);
 
-    glCheckError(gl, log, "after creating framebuffer texture");
+    gl_check_error(gl, log, "after creating framebuffer texture");
 
     gl->BindFramebuffer(GL_FRAMEBUFFER, fbo->fbo);
     gl->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
@@ -322,7 +322,7 @@ bool fbotex_change(struct fbotex *fbo, GL *gl, struct mp_log *log, int w, int h,
 
     gl->BindFramebuffer(GL_FRAMEBUFFER, 0);
 
-    glCheckError(gl, log, "after creating framebuffer");
+    gl_check_error(gl, log, "after creating framebuffer");
 
     return res;
 }
diff --git a/video/out/opengl/utils.h b/video/out/opengl/utils.h
index 1e069f4455..85d3413831 100644
--- a/video/out/opengl/utils.h
+++ b/video/out/opengl/utils.h
@@ -24,13 +24,13 @@
 
 struct mp_log;
 
-void glCheckError(GL *gl, struct mp_log *log, const char *info);
+void gl_check_error(GL *gl, struct mp_log *log, const char *info);
 
 void gl_upload_tex(GL *gl, GLenum target, GLenum format, GLenum type,
                    const void *dataptr, int stride,
                    int x, int y, int w, int h);
 
-mp_image_t *glGetWindowScreenshot(GL *gl);
+mp_image_t *gl_read_window_contents(GL *gl);
 
 const char* mp_sampler_type(GLenum texture_target);
 
diff --git a/video/out/opengl/video.c b/video/out/opengl/video.c
index 97c92b0ae8..8859b34ed8 100644
--- a/video/out/opengl/video.c
+++ b/video/out/opengl/video.c
@@ -523,7 +523,7 @@ static struct bstr load_cached_file(struct gl_video *p, const char *path)
 static void debug_check_gl(struct gl_video *p, const char *msg)
 {
     if (p->gl_debug)
-        glCheckError(p->gl, p->log, msg);
+        gl_check_error(p->gl, p->log, msg);
 }
 
 void gl_video_set_debug(struct gl_video *p, bool enable)
@@ -2983,7 +2983,7 @@ static bool test_fbo(struct gl_video *p, GLint format)
         success = true;
     }
     fbotex_uninit(&fbo);
-    glCheckError(gl, p->log, "FBO test");
+    gl_check_error(gl, p->log, "FBO test");
     return success;
 }
 
diff --git a/video/out/vo_opengl.c b/video/out/vo_opengl.c
index 64d537bd5f..6f4e5948df 100644
--- a/video/out/vo_opengl.c
+++ b/video/out/vo_opengl.c
@@ -311,7 +311,7 @@ static int control(struct vo *vo, uint32_t request, void *data)
         return VO_NOTIMPL;
     }
     case VOCTRL_SCREENSHOT_WIN: {
-        struct mp_image *screen = glGetWindowScreenshot(p->gl);
+        struct mp_image *screen = gl_read_window_contents(p->gl);
         // set image parameters according to the display, if possible
         if (screen) {
             screen->params.primaries = p->renderer_opts->target_prim;