diff --git a/CryptoLib/src/Include/CryptoLibFPC.inc b/CryptoLib/src/Include/CryptoLibFPC.inc
index 6a1041b7..105198f4 100644
--- a/CryptoLib/src/Include/CryptoLibFPC.inc
+++ b/CryptoLib/src/Include/CryptoLibFPC.inc
@@ -144,6 +144,7 @@
   {$ASMMODE STANDARD}
 {$IFEND}
 
+{$OPTIMIZATION NOREGVAR}
 (*
 {$OPTIMIZATION LEVEL3}
 {$OPTIMIZATION NOREGVAR}
diff --git a/CryptoLib/src/Packages/FPC/CryptoLib4PascalPackage.lpk b/CryptoLib/src/Packages/FPC/CryptoLib4PascalPackage.lpk
index a432b061..fa39017c 100644
--- a/CryptoLib/src/Packages/FPC/CryptoLib4PascalPackage.lpk
+++ b/CryptoLib/src/Packages/FPC/CryptoLib4PascalPackage.lpk
@@ -15,7 +15,7 @@
       </SearchPaths>
       <CodeGeneration>
         <Optimizations>
-          <OptimizationLevel Value="1"/>
+          <OptimizationLevel Value="3"/>
         </Optimizations>
       </CodeGeneration>
       <Other>