diff --git a/config/makefiles/rust.mk b/config/makefiles/rust.mk
index abd218185819..75570d32b95b 100644
--- a/config/makefiles/rust.mk
+++ b/config/makefiles/rust.mk
@@ -94,6 +94,8 @@ ifndef MOZ_DEBUG_RUST
 ifndef MOZ_LTO_RUST_CROSS
 # Never enable when sancov is enabled to work around https://github.com/rust-lang/rust/issues/90300.
 ifndef rustflags_sancov
+# Never enable when coverage is enabled to work around https://github.com/rust-lang/rust/issues/90045.
+ifndef MOZ_CODE_COVERAGE
 ifeq (,$(findstring gkrust_gtest,$(RUST_LIBRARY_FILE)))
 cargo_rustc_flags += -Clto
 endif
@@ -103,6 +105,7 @@ endif
 endif
 endif
 endif
+endif
 
 ifdef CARGO_INCREMENTAL
 export CARGO_INCREMENTAL