diff --git a/src/debuglogger.h b/src/debuglogger.h
index cb7021c..c9e8fb9 100644
--- a/src/debuglogger.h
+++ b/src/debuglogger.h
@@ -22,6 +22,11 @@
 #ifndef DEBUGLOGGER_H
 #define DEBUGLOGGER_H
 
+#include "gl-fun.h"
+
+#include <stdio.h>
+#include <algorithm>
+
 struct DebugLoggerPrivate;
 
 class DebugLogger
@@ -34,4 +39,13 @@ private:
 	DebugLoggerPrivate *p;
 };
 
+#define GL_MARKER(format, ...) \
+	if (gl.StringMarker) \
+	{ \
+		char buf[128]; \
+		int len = snprintf(buf, sizeof(buf), format, ##__VA_ARGS__); \
+		gl.StringMarker(std::min<size_t>(len, sizeof(buf)), buf); \
+	}
+
+
 #endif // DEBUGLOGGER_H
diff --git a/src/gl-fun.cpp b/src/gl-fun.cpp
index f47c0a2..09174db 100644
--- a/src/gl-fun.cpp
+++ b/src/gl-fun.cpp
@@ -172,6 +172,13 @@ void initGLFunctions()
 		GL_DEBUG_KHR_FUN;
 	}
 
+	if (HAVE_EXT(GREMEDY_string_marker))
+	{
+#undef EXT_SUFFIX
+#define EXT_SUFFIX "GREMEDY"
+		GL_GREMEMDY_FUN;
+	}
+
 	/* Misc caps */
 	if (!gles || glMajor >= 3 || HAVE_EXT(EXT_unpack_subimage))
 		gl.unpack_subimage = true;
diff --git a/src/gl-fun.h b/src/gl-fun.h
index 8fb29eb..a9862da 100644
--- a/src/gl-fun.h
+++ b/src/gl-fun.h
@@ -55,9 +55,10 @@ typedef void (APIENTRYP _PFNGLTEXSUBIMAGE2DPROC) (GLenum target, GLint level, GL
 typedef void (APIENTRYP _PFNGLTEXPARAMETERIPROC) (GLenum target, GLenum pname, GLint param);
 typedef void (APIENTRYP _PFNGLACTIVETEXTUREPROC) (GLenum texture);
 
-/* Debug callback */
+/* Debugging */
 typedef void (APIENTRY * _GLDEBUGPROC) (GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar* message, const void *userParam);
 typedef void (APIENTRYP _PFNGLDEBUGMESSAGECALLBACKPROC) (_GLDEBUGPROC callback, const void *userParam);
+typedef void (APIENTRYP _PFNGLSTRINGMARKERPROC) (GLsizei len, const GLvoid *string);
 
 /* Buffer object */
 typedef void (APIENTRYP _PFNGLGENBUFFERSPROC) (GLsizei n, GLuint* buffers);
@@ -193,6 +194,9 @@ typedef void (APIENTRYP _PFNGLBINDVERTEXARRAYPROC) (GLuint array);
 #define GL_DEBUG_KHR_FUN \
 	GL_FUN(DebugMessageCallback, _PFNGLDEBUGMESSAGECALLBACKPROC)
 
+#define GL_GREMEMDY_FUN \
+	GL_FUN(StringMarker, _PFNGLSTRINGMARKERPROC)
+
 
 struct GLFunctions
 {
@@ -203,6 +207,7 @@ struct GLFunctions
 	GL_FBO_BLIT_FUN
 	GL_VAO_FUN
 	GL_DEBUG_KHR_FUN
+	GL_GREMEMDY_FUN
 
 	bool glsles;
 	bool unpack_subimage;