diff --git a/libstdc++-v3/libsupc++/Makefile.am b/libstdc++-v3/libsupc++/Makefile.am
index 0a741defff1..6348d69ac92 100644
--- a/libstdc++-v3/libsupc++/Makefile.am
+++ b/libstdc++-v3/libsupc++/Makefile.am
@@ -127,7 +127,7 @@ dyn-string.o: dyn-string.c
 # LTCOMPILE is copied from LTCXXCOMPILE below.
 LTCOMPILE = $(LIBTOOL) --tag CC --tag disable-shared --mode=compile $(CC) \
 	    $(DEFS) $(GCC_INCLUDES) \
-            $(AM_CPPFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(AM_CXXFLAGS) 
+            $(AM_CPPFLAGS) $(CPPFLAGS) 
 
 
 # AM_CXXFLAGS needs to be in each subdirectory so that it can be
diff --git a/libstdc++-v3/libsupc++/Makefile.in b/libstdc++-v3/libsupc++/Makefile.in
index bdd4e8fb759..b531d91ed01 100644
--- a/libstdc++-v3/libsupc++/Makefile.in
+++ b/libstdc++-v3/libsupc++/Makefile.in
@@ -223,7 +223,7 @@ C_COMPILE = \
 # LTCOMPILE is copied from LTCXXCOMPILE below.
 LTCOMPILE = $(LIBTOOL) --tag CC --tag disable-shared --mode=compile $(CC) \
 	    $(DEFS) $(GCC_INCLUDES) \
-            $(AM_CPPFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(AM_CXXFLAGS) 
+            $(AM_CPPFLAGS) $(CPPFLAGS) 
 
 
 # AM_CXXFLAGS needs to be in each subdirectory so that it can be