--- a/src/VBox/HostDrivers/Support/Makefile.kmk
+++ b/src/VBox/HostDrivers/Support/Makefile.kmk
@@ -456,10 +456,6 @@
 	IN_DIS_STATIC \
  	DIS_CORE_ONLY \
  	LOG_DISABLED
- SUPR3HardenedStatic_DEFS.linux += \
- 	SUP_HARDENED_WITH_DLMOPEN
- SUPR3HardenedStatic_DEFS.solaris += \
- 	SUP_HARDENED_WITH_DLMOPEN
 
  SUPR3HardenedStatic_INCS += $(VBOX_PATH_RUNTIME_SRC)/include