diff --git a/iscsi-scst/Makefile b/iscsi-scst/Makefile
index 5a83d7516..9827cac51 100644
--- a/iscsi-scst/Makefile
+++ b/iscsi-scst/Makefile
@@ -55,7 +55,7 @@ ifeq ($(INSTALL_MOD_PATH),)
 endif
 
 INSTALL_DIR := $(INSTALL_MOD_PATH)/lib/modules/$(KVER)/extra
-INFINIBAND_ENABLED = $(shell if grep -wq 'ib_register_client' $$(dirname "$(KDIR)")/modules.symbols; then echo true; else echo false; fi)
+INFINIBAND_ENABLED = $(shell syms=$$(dirname "$(KDIR)")/modules.symbols; if [ -e "$$syms" ] && grep -wq 'ib_register_client' "$$syms" || grep -q "^CONFIG_INFINIBAND=[my]$$" "$(KDIR)/.config"; then echo true; else echo false; fi)
 
 all: progs mods