diff --git a/cde/lib/tt/bin/ttsession/Imakefile b/cde/lib/tt/bin/ttsession/Imakefile
index f7b742512..7d26e6167 100644
--- a/cde/lib/tt/bin/ttsession/Imakefile
+++ b/cde/lib/tt/bin/ttsession/Imakefile
@@ -19,6 +19,10 @@ SYS_LIBRARIES   =
 EXTRA_LIBRARIES = TtClientExtraLibs
 #endif
 
+#if defined(LinuxDistribution)
+CXXEXTRA_DEFINES = -fpermissive
+#endif
+
 SRCS = mp_server.C
 
 OBJS = mp_server.o