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diff --git a/llvm_mode/README.instrument_file.md b/llvm_mode/README.instrument_file.md
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--- a/llvm_mode/README.instrument_file.md
+++ b/llvm_mode/README.instrument_file.md
@@ -18,6 +18,8 @@ For this purpose, I have added a "partial instrumentation" support to the LLVM
 mode of AFLFuzz that allows you to specify on a source file level which files
 should be compiled with or without instrumentation.
 
+Note: When using PCGUARD mode - and have llvm 12+ - you can use this instead:
+https://clang.llvm.org/docs/SanitizerCoverage.html#partially-disabling-instrumentation
 
 ## 2) Building the LLVM module