diff --git a/configure/os/CONFIG.darwin-ppc.darwin-ppc-debug b/configure/os/CONFIG.darwin-ppc.darwin-ppc-debug
index 9890c1916..e9202cafe 100644
--- a/configure/os/CONFIG.darwin-ppc.darwin-ppc-debug
+++ b/configure/os/CONFIG.darwin-ppc.darwin-ppc-debug
@@ -7,8 +7,8 @@
 # Sites may override these definitions in CONFIG_SITE.darwin-ppc.darwin-ppc-debug
 #-------------------------------------------------------
 
-include $(CONFIG)/os/CONFIG.Common.darwin-ppc
-include $(CONFIG)/os/CONFIG.darwin-ppc.darwin-ppc
+-include $(CONFIG)/os/CONFIG.Common.darwin-ppc
+-include $(CONFIG)/os/CONFIG.darwin-ppc.darwin-ppc
 
 # This will cause build failure when used with make -j option
 #BUILD_CLASS = HOST
diff --git a/configure/os/CONFIG.darwin-x86.darwin-x86-debug b/configure/os/CONFIG.darwin-x86.darwin-x86-debug
index 580a0db88..cded9f21b 100644
--- a/configure/os/CONFIG.darwin-x86.darwin-x86-debug
+++ b/configure/os/CONFIG.darwin-x86.darwin-x86-debug
@@ -7,8 +7,8 @@
 # Sites may override these definitions in CONFIG_SITE.darwin-x86.darwin-x86-debug
 #-------------------------------------------------------
 
-include $(CONFIG)/os/CONFIG.Common.darwin-x86
-include $(CONFIG)/os/CONFIG.darwin-x86.darwin-x86
+-include $(CONFIG)/os/CONFIG.Common.darwin-x86
+-include $(CONFIG)/os/CONFIG.darwin-x86.darwin-x86
 
 # This will cause build failure when used with make -j option
 #BUILD_CLASS = HOST
diff --git a/configure/os/CONFIG.solaris-x86.solaris-x86-debug b/configure/os/CONFIG.solaris-x86.solaris-x86-debug
index 5ac889080..58c00b26c 100644
--- a/configure/os/CONFIG.solaris-x86.solaris-x86-debug
+++ b/configure/os/CONFIG.solaris-x86.solaris-x86-debug
@@ -7,6 +7,7 @@
 # Sites may override these definitions in CONFIG_SITE.solaris-x86.solaris-x86-debug
 #-------------------------------------------------------
 
+include $(CONFIG)/os/CONFIG.Common.solaris-x86
 include $(CONFIG)/os/CONFIG.solaris-x86.solaris-x86
 
 #BUILD_CLASS = HOST