diff --git a/configure/os/CONFIG.solaris-sparc-gnu.solaris-sparc-gnu b/configure/os/CONFIG.solaris-sparc-gnu.solaris-sparc-gnu
index 39a9ded3a..7ee267ece 100644
--- a/configure/os/CONFIG.solaris-sparc-gnu.solaris-sparc-gnu
+++ b/configure/os/CONFIG.solaris-sparc-gnu.solaris-sparc-gnu
@@ -12,8 +12,8 @@ include $(CONFIG)/CONFIG.gnuCommon
 
 GNU_DIR = /opt/gnu
 
-CC = $(GNU_BIN)/gcc -D__$(shell uname -s)_$(shell uname -r) 
-CCC = $(GNU_BIN)/g++ -D__$(shell uname -s)_$(shell uname -r) 
+CC = $(GNU_BIN)/gcc
+CCC = $(GNU_BIN)/g++
 AR = ar -rc
 RANLIB=
 LD = ld -r
diff --git a/configure/os/CONFIG.solaris-sparc.solaris-sparc b/configure/os/CONFIG.solaris-sparc.solaris-sparc
index 136ecf2aa..d037a93d5 100644
--- a/configure/os/CONFIG.solaris-sparc.solaris-sparc
+++ b/configure/os/CONFIG.solaris-sparc.solaris-sparc
@@ -28,7 +28,7 @@ CONFORM_CFLAGS_STRICT = -Xc -v
 CONFORM_CFLAGS_TRAD = -Xs
 PROF_CFLAGS_YES =
 PROF_CFLAGS_NO =
-CODE_CFLAGS = -KPIC $(PROF_CFLAGS_$(PROFILE))
+CODE_CFLAGS = -KPIC $(PROF_CFLAGS_$(PROFILE)) -DSOLARIS=$(subst 5.,,$(shell uname -r))
 WARN_CFLAGS_YES =
 WARN_CFLAGS_NO = -w
 OPT_CFLAGS_YES = -xO4
@@ -39,7 +39,7 @@ CONFORM_CXXFLAGS_NORMAL =
 CONFORM_CXXFLAGS_STRICT =
 PROF_CXXFLAGS_YES = +p
 PROF_CXXFLAGS_NO =
-CODE_CXXFLAGS = -KPIC $(PROF_CXXFLAGS_$(PROFILE))
+CODE_CXXFLAGS = -KPIC $(PROF_CXXFLAGS_$(PROFILE)) -DSOLARIS=$(subst 5.,,$(shell uname -r))
 WARN_CXXFLAGS_YES = +w
 WARN_CXXFLAGS_NO =
 OPT_CXXFLAGS_YES = -O