TEXI2HTML_INCLUDES += --I=. --I=$(src-dir) --I=$(outdir) $(DOCUMENTATION_INCLUDES) --I=$(XREF_MAPS_DIR)
TEXI2HTML_FLAGS += $(TEXI2HTML_INCLUDES) $(TEXI2HTML_LANG) $(TEXI2HTML_INIT)
-TEXI2HTML = TOP_SRC_DIR=$(top-src-dir) PERL_UNICODE=SD $(TEXI2HTML_PROGRAM)
+TEXI2HTML = TOP_SRC_DIR=$(top-src-dir) DEPTH=$(depth) PERL_UNICODE=SD $(TEXI2HTML_PROGRAM)
###########
TEXI2PDF_FLAGS += --batch $(DOCUMENTATION_INCLUDES)