diff --git a/code_coverage/seccomp_policy/code_coverage.arm.policy b/code_coverage/seccomp_policy/code_coverage.arm.policy
index b80910f19..35893798e 100644
--- a/code_coverage/seccomp_policy/code_coverage.arm.policy
+++ b/code_coverage/seccomp_policy/code_coverage.arm.policy
@@ -1,4 +1,5 @@
 close: 1
+fchmod: 1
 mkdirat: 1
 msync: 1
 munmap: 1
diff --git a/code_coverage/seccomp_policy/code_coverage.arm64.policy b/code_coverage/seccomp_policy/code_coverage.arm64.policy
index 7040ea258..fdb4d1e54 100644
--- a/code_coverage/seccomp_policy/code_coverage.arm64.policy
+++ b/code_coverage/seccomp_policy/code_coverage.arm64.policy
@@ -1,4 +1,5 @@
 close: 1
+fchmod: 1
 mkdirat: 1
 msync: 1
 munmap: 1
diff --git a/code_coverage/seccomp_policy/code_coverage.policy.def b/code_coverage/seccomp_policy/code_coverage.policy.def
index 599c4a458..b6a4c6d2c 100644
--- a/code_coverage/seccomp_policy/code_coverage.policy.def
+++ b/code_coverage/seccomp_policy/code_coverage.policy.def
@@ -13,6 +13,9 @@
 // 2nd-Nth: uses mmap() to update in place
 
 close: 1
+// fchmod allowed to set libprofile-clang-extras, which wraps `open` calls, to
+// set correct permission for coverage files.
+fchmod: 1
 mkdirat: 1
 msync: 1
 munmap: 1
diff --git a/code_coverage/seccomp_policy/code_coverage.x86.policy b/code_coverage/seccomp_policy/code_coverage.x86.policy
index f8e0cc0f4..145d3a36c 100644
--- a/code_coverage/seccomp_policy/code_coverage.x86.policy
+++ b/code_coverage/seccomp_policy/code_coverage.x86.policy
@@ -1,4 +1,5 @@
 close: 1
+fchmod: 1
 mkdirat: 1
 msync: 1
 munmap: 1
diff --git a/code_coverage/seccomp_policy/code_coverage.x86_64.policy b/code_coverage/seccomp_policy/code_coverage.x86_64.policy
index dcf2f9a11..11c80753c 100644
--- a/code_coverage/seccomp_policy/code_coverage.x86_64.policy
+++ b/code_coverage/seccomp_policy/code_coverage.x86_64.policy
@@ -1,4 +1,5 @@
 close: 1
+fchmod: 1
 mkdirat: 1
 msync: 1
 munmap: 1