diff --git a/src/backend/gl/gl_common.h b/src/backend/gl/gl_common.h
index bf201061..6c1e60f4 100644
--- a/src/backend/gl/gl_common.h
+++ b/src/backend/gl/gl_common.h
@@ -118,7 +118,7 @@ static inline void gl_check_err_(const char *func, int line) {
 /**
  * Check if a GLX extension exists.
  */
-static inline bool gl_has_extension(session_t *ps, const char *ext) {
+static inline bool gl_has_extension(const char *ext) {
 	GLint nexts = 0;
 	glGetIntegerv(GL_NUM_EXTENSIONS, &nexts);
 	if (!nexts) {
diff --git a/src/backend/gl/glx.c b/src/backend/gl/glx.c
index 0337040a..6bba38bf 100644
--- a/src/backend/gl/glx.c
+++ b/src/backend/gl/glx.c
@@ -432,8 +432,8 @@ static void *glx_init(session_t *ps) {
 
 	// Check GL_ARB_texture_non_power_of_two, requires a GLX context and
 	// must precede FBConfig fetching
-	gd->cap.non_power_of_two_texture = gl_has_extension(ps, "GL_ARB_texture_non_"
-	                                                        "power_of_two");
+	gd->cap.non_power_of_two_texture = gl_has_extension("GL_ARB_texture_non_"
+							    "power_of_two");
 
 	gd->glXBindTexImage = (void *)glXGetProcAddress((const GLubyte *)"glXBindTexImage"
 	                                                                 "EXT");