diff --git a/lib/Makefile b/lib/Makefile
index 6e63f44bfb..b0b913bbdf 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -20,10 +20,10 @@
 ##
 
 COMPRESSORS :=
-ifdef $(CONFIG_COMPRESSION_LZMA)
+ifeq ($(CONFIG_COMPRESSION_LZMA),y)
 COMPRESSORS += lzma.o
 endif
-ifdef $(CONFIG_COMPRESSION_NRV2B)
+ifeq ($(CONFIG_COMPRESSION_NRV2B),y)
 COMPRESSORS += nrv2b.o
 endif
 
diff --git a/northbridge/intel/Makefile b/northbridge/intel/Makefile
index 01204e21ad..9193e310c1 100644
--- a/northbridge/intel/Makefile
+++ b/northbridge/intel/Makefile
@@ -19,7 +19,7 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 ##
 
-ifdef CONFIG_NORTHBRIDGE_INTEL_I440BXEMULATION
+ifeq ($(CONFIG_NORTHBRIDGE_INTEL_I440BXEMULATION),y)
 	include $(src)/northbridge/intel/i440bxemulation/Makefile
 endif
 
diff --git a/superio/winbond/Makefile b/superio/winbond/Makefile
index 9ae72bd809..4e897f2acd 100644
--- a/superio/winbond/Makefile
+++ b/superio/winbond/Makefile
@@ -19,7 +19,7 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 ##
 
-ifdef CONFIG_SUPERIO_WINBOND_W83627HF
-  include $(src)/superio/winbond/w83627hf/Makefile
+ifeq ($(CONFIG_SUPERIO_WINBOND_W83627HF),y)
+	include $(src)/superio/winbond/w83627hf/Makefile
 endif