diff --git a/scripts/Makefile.headersinst b/scripts/Makefile.headersinst
index 4241e0d..f7b6705 100644
--- a/scripts/Makefile.headersinst
+++ b/scripts/Makefile.headersinst
@@ -109,7 +109,7 @@
 quiet_cmd_gen		  = GEN     $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
       cmd_gen		  = \
 FNAME=$(patsubst $(INSTALL_HDR_PATH)/$(_dst)/%,%,$@)			\
-STUBDEF=__ASM_STUB_`echo $$FNAME | tr a-z. A-Z_`;			\
+STUBDEF=__ASM_STUB_`echo $$FNAME | tr a-z.- A-Z__`;			\
 (echo "/* File autogenerated by 'make headers_install' */" ;		\
 echo "\#ifndef $$STUBDEF" ;						\
 echo "\#define $$STUBDEF" ;						\