diff --git a/include/nuttx/power/pm.h b/include/nuttx/power/pm.h
index 72caa6e8b2f..482131911f6 100644
--- a/include/nuttx/power/pm.h
+++ b/include/nuttx/power/pm.h
@@ -129,7 +129,7 @@
 #  define CONFIG_PM_MEMORY 2
 #endif
 
-#ifndef CONFIG_PM_MEMORY < 1
+#if CONFIG_PM_MEMORY < 1
 #  error "CONFIG_PM_MEMORY must be >= 1"
 #endif