diff --git a/TracyOpenGL.hpp b/TracyOpenGL.hpp
index 6e876239..9aca6bc9 100644
--- a/TracyOpenGL.hpp
+++ b/TracyOpenGL.hpp
@@ -40,6 +40,14 @@ public:
 #include "common/TracyAlign.hpp"
 #include "common/TracyAlloc.hpp"
 
+#if !defined GL_TIMESTAMP && defined GL_TIMESTAMP_EXT
+#  define GL_TIMESTAMP GL_TIMESTAMP_EXT
+#  define GL_QUERY_COUNTER_BITS GL_QUERY_COUNTER_BITS_EXT
+#  define glGetQueryObjectiv glGetQueryObjectivEXT
+#  define glGetQueryObjectui64v glGetQueryObjectui64vEXT
+#  define glQueryCounter glQueryCounterEXT
+#endif
+
 #define TracyGpuContext tracy::GetGpuCtx().ptr = (tracy::GpuCtx*)tracy::tracy_malloc( sizeof( tracy::GpuCtx ) ); new(tracy::GetGpuCtx().ptr) tracy::GpuCtx;
 #if defined TRACY_HAS_CALLSTACK && defined TRACY_CALLSTACK
 #  define TracyGpuNamedZone( varname, name ) static const tracy::SourceLocationData TracyConcat(__tracy_gpu_source_location,__LINE__) { name, __FUNCTION__,  __FILE__, (uint32_t)__LINE__, 0 }; tracy::GpuCtxScope varname( &TracyConcat(__tracy_gpu_source_location,__LINE__), TRACY_CALLSTACK );