diff --git a/board/hammer/board.h b/board/hammer/board.h
index 9d45a9218b..bc613ec920 100644
--- a/board/hammer/board.h
+++ b/board/hammer/board.h
@@ -11,6 +11,9 @@
 /* TODO: Remove CONFIG_SYSTEM_UNLOCKED prior to building MP FW. */
 #define CONFIG_SYSTEM_UNLOCKED
 
+/* Do not use a dedicated PSTATE bank */
+#undef CONFIG_FLASH_PSTATE_BANK
+
 /* 48 MHz SYSCLK clock frequency */
 #define CPU_CLOCK 48000000