diff --git a/extensions/ARB/ARB_draw_elements_base_vertex.txt b/extensions/ARB/ARB_draw_elements_base_vertex.txt
index caea004..bc91a58 100644
--- a/extensions/ARB/ARB_draw_elements_base_vertex.txt
+++ b/extensions/ARB/ARB_draw_elements_base_vertex.txt
@@ -126,7 +126,7 @@
          sizei count, enum type, const void *indices, int basevertex);
 
     void DrawElementsInstancedBaseVertex(enum mode, sizei count,
-         enum type, const void *indices, sizei drawcount, int basevertex);
+         enum type, const void *indices, sizei instancecount, int basevertex);
 
     void MultiDrawElementsBaseVertex(enum mode, const sizei *count, enum type,
          const void *const *indices, sizei drawcount, const int *basevertex)
@@ -153,7 +153,7 @@
            sizei count, enum type, const void *indices, int basevertex);
 
       void DrawElementsInstancedBaseVertex(enum mode, sizei count,
-           enum type, const void *indices, sizei drawcount, int basevertex);
+           enum type, const void *indices, sizei instancecount, int basevertex);
 
     are equivalent to the commands with the same base name (without the
     "BaseVertex" suffix) except that the <i>th element transferred by