diff --git a/Makefile.in b/Makefile.in
index 1fa0f99bc4f12ce22ff87a97254c697510bea794..fc820dda75d5c40075b201a4c4368e602cdd2e44 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -69,7 +69,7 @@ AR=@AR@
 RANLIB=@RANLIB@
 STRIP=@STRIP@
 INSTALL=@INSTALL@
-CFLAGS=-I. -I$(srcdir)/libtomcrypt @CFLAGS@
+CFLAGS=-I. -I$(srcdir)/libtomcrypt/src/headers/ @CFLAGS@
 LIBS=$(LTC) $(LTM) @LIBS@
 LDFLAGS=@LDFLAGS@