diff --git a/configure/os/CONFIG.solaris-sparc.solaris-sparc b/configure/os/CONFIG.solaris-sparc.solaris-sparc
index 9eacdf881..26c089a9f 100644
--- a/configure/os/CONFIG.solaris-sparc.solaris-sparc
+++ b/configure/os/CONFIG.solaris-sparc.solaris-sparc
@@ -11,7 +11,7 @@ SPARCWORKS = /opt/SUNWspro
 
 CC = $(SPARCWORKS)/bin/cc
 CCC = $(SPARCWORKS)/bin/CC
-CPP = $(CC) -E
+CPP = $(CC) -E -Qn
 RANLIB =
 # required by sun's C++ compiler
 AR = $(CCC) -xar -o