diff --git a/security/sandbox/linux/SandboxFilter.cpp b/security/sandbox/linux/SandboxFilter.cpp
index 5f14e78..1b968ea 100644
--- a/security/sandbox/linux/SandboxFilter.cpp
+++ b/security/sandbox/linux/SandboxFilter.cpp
@@ -1763,10 +1763,10 @@ class GMPSandboxPolicy : public SandboxPolicyCommon {
         return Allow();
       case __NR_sched_get_priority_min:
       case __NR_sched_get_priority_max:
+      case __NR_sched_setscheduler:
         return Allow();
       case __NR_sched_getparam:
-      case __NR_sched_getscheduler:
-      case __NR_sched_setscheduler: {
+      case __NR_sched_getscheduler: {
         Arg<pid_t> pid(0);
         return If(pid == 0, Allow()).Else(Trap(SchedTrap, nullptr));
       }
@@ -1956,12 +1956,14 @@ class RDDSandboxPolicy final : public SandboxPolicyCommon {
       case __NR_sched_getparam:
       case __NR_sched_setparam:
       case __NR_sched_getscheduler:
-      case __NR_sched_setscheduler:
       case __NR_sched_getattr:
       case __NR_sched_setattr: {
         Arg<pid_t> pid(0);
         return If(pid == 0, Allow()).Else(Trap(SchedTrap, nullptr));
       }
+      // sched_setscheduler gets special treatment here (bug 1657849):
+      case __NR_sched_setscheduler:
+        return Allow();
 
         // The priority bounds are also used, sometimes (bug 1838675):
       case __NR_sched_get_priority_min: