diff --git a/HowToBuildFPR.md b/HowToBuildFPR.md
index 302597d..52ee0c5 100644
--- a/HowToBuildFPR.md
+++ b/HowToBuildFPR.md
@@ -42,7 +42,8 @@ These build instructions are always subject to change. You should be familiar wi
 ## Known build issues
 
 * Until [issue 202](/classilla/tenfourfox/issues/202) is fixed, you will get spurious errors setting up the Python environment. You can ignore these for now.
-* You will receive warnings about `N_SECT` while linking XUL. These are harmless. If you actually get an error and it doesn't build, then somehow you are using the original `strip`. Check your binaries carefully. 
+* If your build seems to intermittently crash with an `internal compiler error`, you may be running out of memory. Restarting the build will usually get past the block (it will pick up where it left off). Alternatively, remove `-j2` from the `.mozconfig` build flags: this will only run one compiler instance at once, so the build will be slower, but it will be much less likely to experience memory pressure.
+* If you are making an optimized build, you will get warnings about `N_SECT` while linking and stripping XUL. These are harmless. If you actually get an error and it doesn't build, then somehow you are using the original `strip`. Check your binaries carefully. 
 
 ## Running and debugging