diff --git a/src/headers/tomcrypt_custom.h b/src/headers/tomcrypt_custom.h
index 6d6f4f3..fda79f7 100644
--- a/src/headers/tomcrypt_custom.h
+++ b/src/headers/tomcrypt_custom.h
@@ -343,7 +343,6 @@
 #define LTC_MRSA
 
 /* Include Diffie-Hellman support */
-#ifndef GMP_DESC
 /* is_prime fails for GMP */
 #define LTC_MDH
 /* Supported Key Sizes */
@@ -360,7 +359,6 @@
 #define LTC_DH3072
 #define LTC_DH4096
 #endif
-#endif
 
 /* Include Katja (a Rabin variant like RSA) */
 /* #define LTC_MKAT */