diff --git a/configure/os/CONFIG.Common.iosCommon b/configure/os/CONFIG.Common.iosCommon
index 03d3cab8e..3f6dada42 100644
--- a/configure/os/CONFIG.Common.iosCommon
+++ b/configure/os/CONFIG.Common.iosCommon
@@ -91,11 +91,6 @@ vpath %.m $(USR_VPATH) $(ALL_SRC_DIRS)
 %.o: %.m
 	$(COMPILE.c) -c $<
 
-#--------------------------------------------------
-# Header dependency file generation
-#
-HDEPENDS_METHOD = MKMF
-
 #--------------------------------------------------
 # Allow site overrides
 -include $(CONFIG)/os/CONFIG_SITE.Common.iosCommon
diff --git a/configure/os/CONFIG.Common.vxWorksCommon b/configure/os/CONFIG.Common.vxWorksCommon
index f28f0e327..8f562abb6 100644
--- a/configure/os/CONFIG.Common.vxWorksCommon
+++ b/configure/os/CONFIG.Common.vxWorksCommon
@@ -145,12 +145,6 @@ CODE_CXXFLAGS = $(CODE_CXXFLAGS_$(VXWORKS_MAJOR_VERSION))
 SHRLIB_CFLAGS =
 SHRLIB_LDFLAGS =
 
-#--------------------------------------------------
-# Don't use gcc 2.x for dependency generation
-
-HDEPENDS_METHOD_2 = MKMF
-HDEPENDS_METHOD = $(firstword $(HDEPENDS_METHOD_$(VX_GNU_MAJOR_VERSION)) COMP)
-
 #--------------------------------------------------
 # osithead use default stack, YES or NO override
 OSITHREAD_USE_DEFAULT_STACK = NO
diff --git a/configure/os/CONFIG.darwinCommon.darwinCommon b/configure/os/CONFIG.darwinCommon.darwinCommon
index 2c12b2fbb..d6a7ff11a 100644
--- a/configure/os/CONFIG.darwinCommon.darwinCommon
+++ b/configure/os/CONFIG.darwinCommon.darwinCommon
@@ -82,11 +82,6 @@ vpath %.m $(USR_VPATH) $(ALL_SRC_DIRS)
 %.o: %.m
 	$(COMPILE.c) -c $<
 
-#
-# Header dependency file generation
-#
-HDEPENDS_METHOD = MKMF
-
 #--------------------------------------------------
 # Allow site overrides
 -include $(CONFIG)/os/CONFIG_SITE.darwinCommon.darwinCommon