diff --git a/Makefile b/Makefile
index af04584..ece9d22 100644
--- a/Makefile
+++ b/Makefile
@@ -74,10 +74,10 @@ freq_nov.o: Makefile $(SRC_DIR)freq/freq_nov.c $(SRC_DIR)freq/freq_nov.h
 	$(CC) $(CFLAGS) $(SANITY_FLAGS) -c -pthread $(SRC_DIR)freq/freq_nov.c -o $@
 
 freq_avx.o: Makefile $(SRC_DIR)freq/freq_avx.c $(SRC_DIR)freq/freq_avx.h
-	$(CC) $(CFLAGS) $(SANITY_FLAGS) -c -mavx -mfma -pthread $(SRC_DIR)freq/freq_avx.c -o $@
+	$(CC) $(CFLAGS) $(SANITY_FLAGS) -c -mavx -pthread $(SRC_DIR)freq/freq_avx.c -o $@
 
 freq_avx512.o: Makefile $(SRC_DIR)freq/freq_avx512.c $(SRC_DIR)freq/freq_avx512.h
-	$(CC) $(CFLAGS) $(SANITY_FLAGS) -c -mavx512f -mfma -pthread $(SRC_DIR)freq/freq_avx512.c -o $@
+	$(CC) $(CFLAGS) $(SANITY_FLAGS) -c -mavx512f -pthread $(SRC_DIR)freq/freq_avx512.c -o $@
 
 $(OUTPUT): Makefile $(SOURCE) $(HEADERS)
 	$(CC) $(CFLAGS) $(SANITY_FLAGS) $(SOURCE) -o $(OUTPUT)
diff --git a/src/x86/freq/freq_avx.c b/src/x86/freq/freq_avx.c
index 340b8ed..4935972 100644
--- a/src/x86/freq/freq_avx.c
+++ b/src/x86/freq/freq_avx.c
@@ -17,12 +17,11 @@ void* compute_avx() {
 
   __m256 a = _mm256_set1_ps(1.5);
   __m256 b = _mm256_set1_ps(1.2);
-  __m256 c = _mm256_set1_ps(0.0);
 
   gettimeofday(&begin, NULL);
   while(!end) {
     for(uint64_t i=0; i < LOOP_ITERS; i++) {
-      c = _mm256_fmadd_ps(a, b, c);
+      a = _mm256_add_ps(a, b);
     }
 
     gettimeofday(&now, NULL);
@@ -35,7 +34,7 @@ void* compute_avx() {
     printf("fopen: %s", strerror(errno));
   }
   else {
-    fprintf(fp, "%f", c[0]);
+    fprintf(fp, "%f", a[0]);
     fclose(fp);
   }
 
diff --git a/src/x86/freq/freq_avx512.c b/src/x86/freq/freq_avx512.c
index e6bd917..b546574 100644
--- a/src/x86/freq/freq_avx512.c
+++ b/src/x86/freq/freq_avx512.c
@@ -23,7 +23,6 @@ void* compute_avx512() {
 
   __m512 a[8];
   __m512 b[8];
-  __m512 mult;
 
   for(int i=0; i < 8; i++) {
     a[i] = _mm512_set1_ps(1.5);
@@ -33,14 +32,14 @@ void* compute_avx512() {
   gettimeofday(&begin, NULL);
   while(!end) {
     for(uint64_t i=0; i < LOOP_ITERS; i++) {
-      a[0] = _mm512_fmadd_ps(mult, a[0], b[0]);
-      a[1] = _mm512_fmadd_ps(mult, a[1], b[1]);
-      a[2] = _mm512_fmadd_ps(mult, a[2], b[2]);
-      a[3] = _mm512_fmadd_ps(mult, a[3], b[3]);
-      a[4] = _mm512_fmadd_ps(mult, a[4], b[4]);
-      a[5] = _mm512_fmadd_ps(mult, a[5], b[5]);
-      a[6] = _mm512_fmadd_ps(mult, a[6], b[6]);
-      a[7] = _mm512_fmadd_ps(mult, a[7], b[7]);
+      a[0] = _mm512_add_ps(a[0], b[0]);
+      a[1] = _mm512_add_ps(a[1], b[1]);
+      a[2] = _mm512_add_ps(a[2], b[2]);
+      a[3] = _mm512_add_ps(a[3], b[3]);
+      a[4] = _mm512_add_ps(a[4], b[4]);
+      a[5] = _mm512_add_ps(a[5], b[5]);
+      a[6] = _mm512_add_ps(a[6], b[6]);
+      a[7] = _mm512_add_ps(a[7], b[7]);
     }
 
     gettimeofday(&now, NULL);