diff --git a/lib/Makefile b/lib/Makefile
index 51eba80..15259d0 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -58,7 +58,7 @@
 obj-$(CONFIG_TPM_V2) += tpm-v2.o
 endif
 
-obj-$(CONFIG_RSA) += rsa/
+obj-$(CONFIG_$(SPL_)RSA) += rsa/
 obj-$(CONFIG_SHA1) += sha1.o
 obj-$(CONFIG_SHA256) += sha256.o