diff --git a/Makefile.Defines b/Makefile.Defines
index 83f1df3f3..e764b40ee 100644
--- a/Makefile.Defines
+++ b/Makefile.Defines
@@ -51,13 +51,13 @@ ADVIXE_FLAGS = -g -O2 -qopt-report=5 -vec -vecabi=cmdtarget -simd -shared-intel
 VTUNE_FLAGS = -g -O2 -vec -simd -shared-intel -qopenmp -debug inline-debug-info -parallel-source-info=2 -parallel -DTBB_DEBUG -DTBB_USE_THREADING_TOOLS -qopenmp -fp-model no-except -mp1 -xhost -traceback 
 #Be sure to set the environment variable KMP_FORKJOIN_FRAMES=1 for OpenMP debuging in vtune
 
-IDEBUG = -O0 -nogen-interfaces -no-pie -no-ftz -fpe-all=0 -g -traceback -mp1 -fp-model strict -fpe0 -debug all -align all -pad -ip -prec-div -prec-sqrt -assume protect-parens -CB -no-wrap-margin
+IDEBUG = -O0 -init=snan,arrays  -nogen-interfaces -no-pie -no-ftz -fpe-all=0 -g -traceback -mp1 -fp-model strict -fpe0 -debug all -align all -pad -ip -prec-div -prec-sqrt -assume protect-parens -CB -no-wrap-margin
 STRICTREAL = -fp-model strict -fp-model no-except -prec-div -prec-sqrt -assume protect-parens 
 SIMDVEC = -simd -xhost -align all -assume contiguous_assumed_shape -vecabi=cmdtarget -prec-div -prec-sqrt -assume protect-parens
 PAR = -qopenmp #-parallel  #Something goes wrong in SyMBA at the moment with auto-paralellization enabled
 HEAPARR = -heap-arrays 1048576 
 OPTREPORT = -qopt-report=5 
-IPRODUCTION = -no-wrap-margin -O3 $(STRICTREAL) $(PAR) $(SIMDVEC) $(HEAPARR) 
+IPRODUCTION = -init=snan,arrays  -no-wrap-margin -O3 $(STRICTREAL) $(PAR) $(SIMDVEC) $(HEAPARR) 
 
 #gfortran flags
 GDEBUG = -g -Og -fbacktrace -fbounds-check -ffree-line-length-none