diff --git a/configure/os/CONFIG.Common.solaris-sparc b/configure/os/CONFIG.Common.solaris-sparc
index 558d5551e..e4c05bf1e 100644
--- a/configure/os/CONFIG.Common.solaris-sparc
+++ b/configure/os/CONFIG.Common.solaris-sparc
@@ -16,12 +16,12 @@ ARCH_CLASS = sparc
 CODE_CPPFLAGS = -D__EXTENSIONS__
 
 # This is the only combination of posix threads flags that works with solaris 6
-POSIX_CPPFLAGS_YES = -D_REENTRANT -D_POSIX_C_SOURCE=199506L
-POSIX_LDLIBS_YES += -lposix4 -lpthread -lthread
+####POSIX_CPPFLAGS_YES = -D_REENTRANT -D_POSIX_C_SOURCE=199506L
+####POSIX_LDLIBS_YES += -lposix4 -lpthread -lthread
 
 # This set of flags is recommended by sun for posix threads and works with solaris 8
-####POSIX_CPPFLAGS_YES = -D_POSIX_C_SOURCE=199506L
-####POSIX_LDLIBS_YES += -lposix4 -lpthread
+POSIX_CPPFLAGS_YES = -D_POSIX_C_SOURCE=199506L
+POSIX_LDLIBS_YES += -lposix4 -lpthread
 
 POSIX_CPPFLAGS_NO =
 POSIX_LDLIBS_NO +=