diff --git a/deps/libtomcrypt b/deps/libtomcrypt
index bd7933cc..de15a6fa 160000
--- a/deps/libtomcrypt
+++ b/deps/libtomcrypt
@@ -1 +1 @@
-Subproject commit bd7933cc2b43ebe7c4349614c6cf1271251ebee4
+Subproject commit de15a6fad94a1d6d05a197bd409adbec084fac2b
diff --git a/premake5.lua b/premake5.lua
index 14bb0e26..b5d12f96 100644
--- a/premake5.lua
+++ b/premake5.lua
@@ -251,7 +251,7 @@ workspace "iw4x"
 		-- libtomcrypt
 		project "libtomcrypt"
 			language "C"
-			defines { "_LIB", "LTC_SOURCE", "LTC_NO_RSA_BLINDING", "LTM_DESC", "USE_LTM", "WIN32" }
+			defines { "_LIB", "LTC_SOURCE", "LTC_NO_FAST", "LTC_NO_RSA_BLINDING", "LTM_DESC", "USE_LTM", "WIN32" }
 			
 			links { "libtommath" }
 			includedirs { "./deps/libtomcrypt/src/headers"  }