diff --git a/benchmarks/dhrystone/Makefile b/benchmarks/dhrystone/Makefile
index 2c867e9..42a88cd 100644
--- a/benchmarks/dhrystone/Makefile
+++ b/benchmarks/dhrystone/Makefile
@@ -8,7 +8,7 @@ HEADERS := dhry.h
 BOARD=iss
 LINK_TARGET=link
 RISCV_ARCH:=rv32$(ISA)
-ifeq ($(ISA),e)
+ifneq (,$(findstring e,$(ISA)))
     RISCV_ABI:=ilp32e
 else
     RISCV_ABI:=ilp32
diff --git a/hello-world/Makefile b/hello-world/Makefile
index 50b9179..aaa1e40 100644
--- a/hello-world/Makefile
+++ b/hello-world/Makefile
@@ -1,4 +1,3 @@
-
 TARGET  = hello
 ISA?=imc
 
@@ -10,7 +9,7 @@ CFLAGS += $(OPT) -g
 BOARD=iss
 LINK_TARGET=link
 RISCV_ARCH:=rv32$(ISA)
-ifeq ($(ISA),e)
+ifneq (,$(findstring e,$(ISA)))
     RISCV_ABI:=ilp32e
 else
     RISCV_ABI:=ilp32