diff --git a/module/mpmm/src/mod_mpmm.c b/module/mpmm/src/mod_mpmm.c
index 35a889f3afc46c09570b5f120279e64ed1947016..14fb63f824d9fa4ca444dd5a611f871bdaf0f28b 100644
--- a/module/mpmm/src/mod_mpmm.c
+++ b/module/mpmm/src/mod_mpmm.c
@@ -124,7 +124,9 @@ static void mpmm_core_check_enabled(
 /* Set the MPMM threshold for a specific core. */
 static void mpmm_core_set_threshold(struct mod_mpmm_core_ctx *core_ctx)
 {
-    core_ctx->mpmm->MPMMCR |=
+    core_ctx->mpmm->MPMMCR =
+        (core_ctx->mpmm->MPMMCR &
+         ~(MPMM_MPMMCR_GEAR_MASK << MPMM_MPMMCR_GEAR_POS)) |
         ((core_ctx->threshold & MPMM_MPMMCR_GEAR_MASK) << MPMM_MPMMCR_GEAR_POS);
 }