diff --git a/CMakeLists.txt b/CMakeLists.txt
index 87ef46e..30fae96 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,14 +41,22 @@ message("---- CMAKE_Fortran_COMPILER: " ${CMAKE_Fortran_COMPILER})
 if(CMAKE_Fortran_COMPILER_ID MATCHES GNU)
   set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -std=f2008 -Wall -fdefault-real-8 -ffpe-trap=invalid,zero,overflow")
   set(CMAKE_Fortran_FLAGS_DEBUG "-O0 -g -pg -fbounds-check -fbacktrace")
-  set(CMAKE_Fortran_FLAGS_RELEASE "-O3")
+  if (DETERMINISTIC)
+    set(CMAKE_Fortran_FLAGS_RELEASE "-O0")
+  else()
+    set(CMAKE_Fortran_FLAGS_RELEASE "-O3")
+  endif()
 endif()
 
 # compiler flags for ifort
 if(CMAKE_Fortran_COMPILER_ID MATCHES Intel)
-  set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -r8 -fpe0 -fp-model precise -fp-model source -align all -traceback")
-  set(CMAKE_Fortran_FLAGS_DEBUG "-g3 -O0 -check all")
-  set(CMAKE_Fortran_FLAGS_RELEASE "-g3 -O2 -axCORE-AVX2 -debug all -check none -qopt-report=5 -qopt-report-annotate")
+  set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -r8 -fpe0 -fp-model precise -fp-model source -align all")
+  set(CMAKE_Fortran_FLAGS_DEBUG "-g3 -O0 -check all -traceback")
+  if (DETERMINISTIC)
+    set(CMAKE_Fortran_FLAGS_RELEASE "-g0 -O0 -axCORE-AVX2 -debug none -check none -qopt-report=5 -qopt-report-annotate")
+  else()
+    set(CMAKE_Fortran_FLAGS_RELEASE "-g3 -O2 -axCORE-AVX2 -debug all -check none -qopt-report=5 -qopt-report-annotate -traceback")
+  endif()
 endif()
 
 find_package(PkgConfig REQUIRED)