--- a/configure.ac
+++ b/configure.ac
@@ -45,11 +45,8 @@ fi
 # LTM_CFLAGS is given to ./configure by the user, 
 # DROPBEAR_LTM_CFLAGS is substituted in the LTM Makefile.in
 DROPBEAR_LTM_CFLAGS="$LTM_CFLAGS"
-if test -z "$DROPBEAR_LTM_CFLAGS"; then
-	DROPBEAR_LTM_CFLAGS="-O3 -funroll-loops -fomit-frame-pointer"
-fi
-AC_MSG_NOTICE(Setting LTM_CFLAGS to $DROPBEAR_LTM_CFLAGS)
-AC_ARG_VAR(LTM_CFLAGS, CFLAGS for bundled libtommath. Default -O3 -funroll-loops -fomit-frame-pointer)
+AC_MSG_NOTICE(Setting LTM_CFLAGS to '$DROPBEAR_LTM_CFLAGS')
+AC_ARG_VAR(LTM_CFLAGS, CFLAGS for bundled libtommath. Defaults to empty string)
 AC_SUBST(DROPBEAR_LTM_CFLAGS)
 
 AC_MSG_NOTICE([Checking if compiler '$CC' supports -Wno-pointer-sign])
--- a/libtomcrypt/src/headers/tomcrypt_dropbear.h
+++ b/libtomcrypt/src/headers/tomcrypt_dropbear.h
@@ -7,8 +7,10 @@
 
 /* Use small code where possible */
 #if DROPBEAR_SMALL_CODE
+#ifndef LTC_SMALL_CODE
 #define LTC_SMALL_CODE
 #endif
+#endif
 
 /* Fewer entries needed */
 #define TAB_SIZE      5