diff --git a/Makefile b/Makefile
index fdfd7b0126b463a51206bf34b1d909f8894f4bcd..9d992b6cf65d3c42db2ecd97bb00243ed6c143a5 100644
--- a/Makefile
+++ b/Makefile
@@ -64,7 +64,7 @@ CFLAGS   += -std=c99 -pedantic -Wcast-qual -Wall -W -Wextra -Wno-long-long     \
             -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes  \
             -Werror-implicit-function-declaration \
             -Wno-implicit-fallthrough -ffp-contract=off \
-            -Winit-self -Wunused-but-set-variable
+            -Winit-self -Wunused-but-set-variable -funsafe-math-optimizations
 # to be uncommented in CI
 # CFLAGS += -Werror
 
diff --git a/lib_com/options.h b/lib_com/options.h
index bbea3aa1534059d14c1f9b80304d8ebe81ea7d42..fe6c29b89cc692a7cbdd26f22026948b1b6faddd 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -161,7 +161,7 @@
 /*#define FIX_I4_OL_PITCH*/                             /* fix open-loop pitch used for EVS core switching */
 #define TMP_1342_WORKAROUND_DEC_FLUSH_BROKEN_IN_SR      /* FhG: Temporary workaround for incorrect implementation of decoder flush with split rendering */
 #define NONBE_1122_KEEP_EVS_MODE_UNCHANGED              /* FhG: Disables fix for issue 1122 in EVS mode to keep BE tests green. This switch should be removed once the 1122 fix is added to EVS via a CR.  */
-
+#define FIX_FLOAT_1544_ITD_IMPRECISION_UNSAFE_MATH      /* FhG: Avoid imprecisions wih -funsafe-math-optimizations in stereo_dft_quantize_itd() */
 
 /* #################### End BE switches ################################## */
 
diff --git a/lib_enc/ivas_stereo_dft_enc_itd.c b/lib_enc/ivas_stereo_dft_enc_itd.c
index f48fd9a667beedc99f03ce8829ca164fdac6f2a7..dc9b3e6021f071f430597e1037f3efc2f166f2f5 100644
--- a/lib_enc/ivas_stereo_dft_enc_itd.c
+++ b/lib_enc/ivas_stereo_dft_enc_itd.c
@@ -165,7 +165,11 @@ static void stereo_dft_quantize_itd(
     }
 
     /*Convert back @ fs*/
+#ifdef FIX_FLOAT_1544_ITD_IMPRECISION_UNSAFE_MATH
+    *out = (float) ( ( itd * input_Fs ) / ( (double) ( STEREO_DFT_ITD_FS ) ) ); /* use double arithmetic, to avoid imprecisions with optimizations using -funsafe-math-optimizations */
+#else
     *out = (float) ( itd * input_Fs ) / ( (float) ( STEREO_DFT_ITD_FS ) );
+#endif
 
     return;
 }