diff --git a/README.md b/README.md
index e2b7940..71059f4 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ Apart from that, many tools to study and evaluate the in-depth performance of su
 Properly configure your building by changing `config.mk` file. The following options are available:
 
 - **TAG:** Compiler tag (available options: GCC, CLANG, ICC, ONEAPI, NVCC).
-- **ISA:** Instruction set (available options: SSE, AVX, AVX2, AVX512).
+- **ISA:** Instruction set (available options: SSE, AVX, AVX\_FMA, AVX2, AVX512).
 - **MASK\_REGISTERS:** Use AVX512 mask registers (always true when ISA is set to AVX512).
 - **OPT\_SCHEME:** Optimization algorithm (available options: lammps, gromacs).
 - **ENABLE\_LIKWID:** Enable likwid to make use of HPM counters.
diff --git a/common/includes/simd/avx2_double.h b/common/includes/simd/avx2_double.h
index beebc16..c48fe6c 100644
--- a/common/includes/simd/avx2_double.h
+++ b/common/includes/simd/avx2_double.h
@@ -60,7 +60,8 @@ static inline MD_FLOAT simd_incr_reduced_sum(MD_FLOAT *m, MD_SIMD_FLOAT v0, MD_S
 }
 
 static inline MD_SIMD_FLOAT select_by_mask(MD_SIMD_FLOAT a, MD_SIMD_MASK m) { return _mm256_and_pd(a, m); }
-static inline MD_SIMD_FLOAT simd_reciprocal(MD_SIMD_FLOAT a) { return _mm256_rcp14_pd(a); }
+static inline MD_SIMD_FLOAT simd_reciprocal(MD_SIMD_FLOAT a) { return _mm256_cvtps_pd(_mm_rcp_ps(_mm256_cvtpd_ps(a))); }
+//static inline MD_SIMD_FLOAT simd_reciprocal(MD_SIMD_FLOAT a) { return _mm256_rcp14_pd(a); }
 static inline MD_SIMD_FLOAT simd_fma(MD_SIMD_FLOAT a, MD_SIMD_FLOAT b, MD_SIMD_FLOAT c) { return _mm256_fmadd_pd(a, b, c); }
 static inline MD_SIMD_FLOAT simd_masked_add(MD_SIMD_FLOAT a, MD_SIMD_FLOAT b, MD_SIMD_MASK m) { return simd_add(a, _mm256_and_pd(b, m)); }
 static inline MD_SIMD_MASK simd_mask_cond_lt(MD_SIMD_FLOAT a, MD_SIMD_FLOAT b) { return _mm256_cmp_pd(a, b, _CMP_LT_OQ); }