--- bc-1.06.orig/lib/Makefile.am
+++ bc-1.06/lib/Makefile.am
@@ -7,7 +7,7 @@
 
 DEFS = @DEFS@ $(DEFSADD)
 
-CFLAGS = @CFLAGS@ -Wall -funsigned-char
+AM_CFLAGS = @CFLAGS@ -Wall -funsigned-char
 
 MAINTAINERCLEANFILES = Makefile.in number.c
 
--- bc-1.06.orig/bc/Makefile.am
+++ bc-1.06/bc/Makefile.am
@@ -16,9 +16,9 @@
 LIBL = @LEXLIB@
 LDADD = $(LIBBC) $(LIBL) @READLINELIB@
 
-YFLAGS = -d
+AM_YFLAGS = -d
 
-CFLAGS = @CFLAGS@ -Wall -funsigned-char
+AM_CFLAGS = @CFLAGS@ -Wall -funsigned-char
 
 $(PROGRAMS): $(LIBBC)
 
--- bc-1.06.orig/dc/Makefile.am
+++ bc-1.06/dc/Makefile.am
@@ -9,6 +9,6 @@
 
 MAINTAINERCLEANFILES = Makefile.in
 
-CFLAGS = @CFLAGS@ -Wall -funsigned-char
+AM_CFLAGS = @CFLAGS@ -Wall -funsigned-char
 
 $(PROGRAMS): $(LDADD)