diff --git a/make/py-mod.mk b/make/py-mod.mk
index a57d0ffd..aabe562b 100644
--- a/make/py-mod.mk
+++ b/make/py-mod.mk
@@ -4,7 +4,7 @@ include $(JWBDIR)/make/dirs.mk
 include $(JWBDIR)/make/dev-utils.mk
 
 PY_INIT_TMPL                 = $(wildcard __init__.py.tmpl)
-PY_SED_EXTRACT_EXPORT       ?= /\(\(class\|def\) .\+\|^ *\S\+\s*=.*\)\# *export/ !d; s/\(async\)* *\(class\|def\) *//; s/[(:=].*//
+PY_SED_EXTRACT_EXPORT       ?= /\(\(class\|def\)\s\+[a-zA-Z_].*\|^ *\S\+\s*=.*\)\# *export/ !d; s/\(async\)* *\(class\|def\) *//; s/[(:=].*//
 
 #leftparen                  := (
 #PY_EXPORT                  ?= $(shell sed '/\(class\|def\) ..*\# *export/ !d; s/\(class\|def\) *//; s/[$(leftparen):].*//' $(PY_SRC_PY))