diff --git a/src/main/target/common_post.h b/src/main/target/common_post.h
index ffa0202582..c268184d05 100644
--- a/src/main/target/common_post.h
+++ b/src/main/target/common_post.h
@@ -58,6 +58,16 @@
 #endif
 #endif
 
+#if !defined(USE_MAG)
+#undef USE_MAG_DATA_READY_SIGNAL
+#undef USE_MAG_HMC5883
+#undef USE_MAG_SPI_HMC5883
+#undef USE_MAG_QMC5883
+#undef USE_MAG_LIS3MDL
+#undef USE_MAG_AK8963
+#undef USE_MAG_SPI_AK8963
+#endif
+
 #if !defined(USE_BARO) && !defined(USE_GPS)
 #undef USE_VARIO
 #endif