Clarify text for GLSL and OpenCL header versions.
diff --git a/README.md b/README.md
index 369b1e0..b8ff5c3 100644
--- a/README.md
+++ b/README.md
@@ -12,8 +12,8 @@
Under the [include](include) directory, header files are provided according to
their own version. Only major and minor version numbers count.
For example, the headers for SPIR-V 1.1 are in
-[include/spirv/1.1](include/spirv/1.1). Also, the 1.0 versions of the
-GLSL.std.450 and OpenCL extended instruction sets are in
+[include/spirv/1.1](include/spirv/1.1). Also, the headers for the 1.0 versions
+of the GLSL.std.450 and OpenCL extended instruction sets are in
[include/spirv/1.0](include/spirv/1.0).
In contrast, the XML registry file has a linear history, so it is
