diff --git a/lib_com/options.h b/lib_com/options.h
index 24a8afca14acff7c80e0f2a98a2ea14233436f12..dec62b523c92816ea679a9c2d954a78e2b5f0ce4 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -89,6 +89,7 @@
 #define FIX_2252_SCALING_SAVE_HB_SYNTH                  /* VA: issue 2252: fix use-of-uninit-value in save_hb_synth_fx[] scaling in FOA decoding with bitstream that starts with an SID */
 #define FIX_2248_EVS_ASSERT                             /* VA: Include _sat in an EVS related part of the code */
 #define FIX_2254_IMPROV_COMPLEXITY_BE                   /* VA: BE small complexity reduction  */
+#define FIX_2274_OOB_INDEXING_IN_CORRMATRIX             /* FhG: fix OOB indexing complaint */
 #define FIX_2278_OOB_INDEXING_IN_CLOSED_LOOP_PIT_SEARCH /* FhG: fix oob indexing USAN complaint */
 #define FIX_2287_MCT_MDCT_STEREO_DATA_MALLOC_SIZE       /* FhG: correct allocation size for STEREO_MDCT_DEC_DATA struct */
 
diff --git a/lib_enc/enc_acelp_fx.c b/lib_enc/enc_acelp_fx.c
index bdbc32fec52c796dd776d963b7e3c080382baba1..626d89aaaf8a6a38f47b93f54608e1626a4782fa 100644
--- a/lib_enc/enc_acelp_fx.c
+++ b/lib_enc/enc_acelp_fx.c
@@ -997,7 +997,14 @@ void E_ACELP_corrmatrix_fx(
         p3 = &rrixiy[2][pos]; /* Q9 */
         p2 = &rrixiy[1][pos];
         p1 = &rrixiy[0][pos];
+#ifdef FIX_2274_OOB_INDEXING_IN_CORRMATRIX
+        p0 = &rrixiy[3][pos];
+        /* decrement pointer instead of indexing the array to avoid CLANG Usan complaint */
+        /* for last loop iteration, this points to rrixiy[3][-1], but is not actually accessed in later loop (k = 15 then, so inner loop will not run) */
+        p0 -= 16;
+#else
         p0 = &rrixiy[3][pos - 16];
+#endif
 
         cor = L_deposit_h( 0 );
         ptr_h1 = h;      /*Q12*/