diff --git a/src/glsl/builtin_variables.cpp b/src/glsl/builtin_variables.cpp
index 6a17adea232..e453de475be 100644
--- a/src/glsl/builtin_variables.cpp
+++ b/src/glsl/builtin_variables.cpp
@@ -527,7 +527,7 @@ generate_common_ES_uniforms(exec_list *instructions,
    add_builtin_constant(instructions, symtab, "gl_MaxVertexAttribs",
 			state->Const.MaxVertexAttribs);
    add_builtin_constant(instructions, symtab, "gl_MaxVertexUniformVectors",
-			state->Const.MaxVertexUniformComponents);
+			state->Const.MaxVertexUniformComponents / 4);
    add_builtin_constant(instructions, symtab, "gl_MaxVertexTextureImageUnits",
 			state->Const.MaxVertexTextureImageUnits);
    add_builtin_constant(instructions, symtab, "gl_MaxCombinedTextureImageUnits",