diff --git a/configs/pcblogic-pic32mx/ostest/defconfig b/configs/pcblogic-pic32mx/ostest/defconfig
index e357a9e3560..0e74af970e8 100644
--- a/configs/pcblogic-pic32mx/ostest/defconfig
+++ b/configs/pcblogic-pic32mx/ostest/defconfig
@@ -309,7 +309,7 @@ CONFIG_HAVE_LIBM=n
 CONFIG_DEBUG=n
 CONFIG_DEBUG_VERBOSE=n
 CONFIG_DEBUG_SYMBOLS=n
-CONFIG_MM_REGIONS=2
+CONFIG_MM_REGIONS=1
 CONFIG_ARCH_LOWPUTC=y
 CONFIG_RR_INTERVAL=200
 CONFIG_SCHED_INSTRUMENTATION=n