diff --git a/source/src/rendercubes.cpp b/source/src/rendercubes.cpp
index f0225f1b..332c75f7 100644
--- a/source/src/rendercubes.cpp
+++ b/source/src/rendercubes.cpp
@@ -34,10 +34,12 @@ stripbatch stripbatches[256];
 uchar renderedtex[256];
 int renderedtexs = 0;
 
+extern int ati_mda_bug;
+
 #define RENDERSTRIPS(strips, type) \
     if(strips.first.length()) \
     { \
-        if(hasMDA) glMultiDrawArrays_(type, strips.first.getbuf(), strips.count.getbuf(), strips.first.length()); \
+        if(hasMDA && !ati_mda_bug) glMultiDrawArrays_(type, strips.first.getbuf(), strips.count.getbuf(), strips.first.length()); \
         else loopv(strips.first) glDrawArrays(type, strips.first[i], strips.count[i]); \
         strips.first.setsizenodelete(0); \
         strips.count.setsizenodelete(0); \
diff --git a/source/src/rendergl.cpp b/source/src/rendergl.cpp
index e151469c..316f09b0 100644
--- a/source/src/rendergl.cpp
+++ b/source/src/rendergl.cpp
@@ -38,6 +38,8 @@ int glext(char *ext)
 }
 COMMAND(glext, ARG_1EST);
 
+VAR(ati_mda_bug, 0, 0, 1);
+
 void gl_checkextensions()
 {
     const char *vendor = (const char *)glGetString(GL_VENDOR);
@@ -64,6 +66,8 @@ void gl_checkextensions()
         glMultiDrawArrays_   = (PFNGLMULTIDRAWARRAYSEXTPROC)  getprocaddress("glMultiDrawArraysEXT");
         glMultiDrawElements_ = (PFNGLMULTIDRAWELEMENTSEXTPROC)getprocaddress("glMultiDrawElementsEXT");
         hasMDA = true;
+
+        if(strstr(vendor, "ATI")) ati_mda_bug = 1;
     }
 
 #ifndef _DEBUG