diff --git a/Source/Core/Common/GL/GLInterface/GLX.cpp b/Source/Core/Common/GL/GLInterface/GLX.cpp
index 930994a992..b04296d096 100644
--- a/Source/Core/Common/GL/GLInterface/GLX.cpp
+++ b/Source/Core/Common/GL/GLInterface/GLX.cpp
@@ -13,7 +13,11 @@
 
 typedef GLXContext (*PFNGLXCREATECONTEXTATTRIBSPROC)(Display*, GLXFBConfig, GLXContext, Bool,
                                                      const int*);
+
+#ifndef GLX_EXT_swap_control
 typedef void (*PFNGLXSWAPINTERVALEXTPROC)(Display*, GLXDrawable, int);
+#endif
+
 typedef int (*PFNGLXSWAPINTERVALMESAPROC)(unsigned int);
 
 static PFNGLXCREATECONTEXTATTRIBSPROC glXCreateContextAttribs = nullptr;