diff --git a/cc/coverage.go b/cc/coverage.go
index 0549705..ad2f1e4 100644
--- a/cc/coverage.go
+++ b/cc/coverage.go
@@ -53,6 +53,10 @@
 		flags.Coverage = true
 		flags.GlobalFlags = append(flags.GlobalFlags, "--coverage", "-O0")
 		cov.linkCoverage = true
+
+		// Override -Wframe-larger-than and non-default optimization
+		// flags that the module may use.
+		flags.CFlags = append(flags.CFlags, "-Wno-frame-larger-than=", "-O0")
 	}
 
 	// Even if we don't have coverage enabled, if any of our object files were compiled