diff --git a/include/simdcomputil.h b/include/simdcomputil.h
index de91517..a0c446d 100644
--- a/include/simdcomputil.h
+++ b/include/simdcomputil.h
@@ -31,14 +31,14 @@ uint32_t simdmin(const uint32_t * in);
 /* computes (quickly) the minimal value of the specified number of values */
 uint32_t simdmin_length(const uint32_t * in, uint32_t length);
 
-
+#ifdef __SSE4_1__
 /* computes (quickly) the minimal and maximal value of the specified number of values */
 void simdmaxmin_length(const uint32_t * in, uint32_t length, uint32_t * getmin, uint32_t * getmax);
 
 /* computes (quickly) the minimal and maximal value of the 128 values */
 void simdmaxmin(const uint32_t * in, uint32_t * getmin, uint32_t * getmax);
 
-
+#endif
 
 /* like maxbit over 128 integers (SIMDBlockSize) with provided initial value 
    and using differential coding */
diff --git a/src/simdcomputil.c b/src/simdcomputil.c
index 5b6cb4a..4437c7a 100644
--- a/src/simdcomputil.c
+++ b/src/simdcomputil.c
@@ -3,7 +3,9 @@
  */
 
 #include "simdcomputil.h"
+#ifdef __SSE4_1__
 #include <smmintrin.h>
+#endif
 #include <assert.h>
 
 #define Delta(curr, prev) \
@@ -49,6 +51,8 @@ static uint32_t orasint(const __m128i accumulator) {
 	return  _mm_cvtsi128_si32(_tmp2);
 }
 
+#ifdef __SSE4_1__
+
 static uint32_t minasint(const __m128i accumulator) {
 	const __m128i _tmp1 = _mm_min_epu32(_mm_srli_si128(accumulator, 8), accumulator); /* (A,B,C,D) xor (0,0,A,B) = (A,B,C xor A,D xor B)*/
 	const __m128i _tmp2 = _mm_min_epu32(_mm_srli_si128(_tmp1, 4), _tmp1); /*  (A,B,C xor A,D xor B) xor  (0,0,0,C xor A)*/
@@ -135,7 +139,7 @@ void simdmaxmin_length(const uint32_t * in, uint32_t length, uint32_t * getmin,
 	}
 }
 
-
+#endif
 
 SIMDCOMP_PURE uint32_t maxbits_length(const uint32_t * in,uint32_t length) {
 	  uint32_t k;
diff --git a/src/simdintegratedbitpacking.c b/src/simdintegratedbitpacking.c
index a3093c0..005aa8e 100644
--- a/src/simdintegratedbitpacking.c
+++ b/src/simdintegratedbitpacking.c
@@ -24867,6 +24867,8 @@ void simdfastsetd1fromprevious( __m128i * in, uint32_t bit, uint32_t previousval
 	simdfastset(in, bit, value - previousvalue, index);
 }
 
+#ifdef __SSE4_1__
+
 void simdfastsetd1(uint32_t initvalue, __m128i * in, uint32_t bit, uint32_t value, size_t index) {
 	if(index == 0) {
 		simdfastset(in, bit, value - initvalue, index);
@@ -24875,3 +24877,6 @@ void simdfastsetd1(uint32_t initvalue, __m128i * in, uint32_t bit, uint32_t valu
 		simdfastset(in, bit, value - prev, index);
 	}
 }
+
+#endif
+
diff --git a/src/simdpackedsearch.c b/src/simdpackedsearch.c
index bfcd26a..e2f14b3 100644
--- a/src/simdpackedsearch.c
+++ b/src/simdpackedsearch.c
@@ -1,6 +1,8 @@
 /**
  * This code is released under a BSD License.
  */
+#ifdef __SSE4_1__
+
 #include <smmintrin.h>
 #include "simdintegratedbitpacking.h"
 
@@ -15861,3 +15863,4 @@ simdsearchd1(__m128i * initOffset, const __m128i *in, uint32_t bit,
    return (-1);
 }
 
+#endif
diff --git a/src/simdpackedselect.c b/src/simdpackedselect.c
index e7adb02..09898f1 100644
--- a/src/simdpackedselect.c
+++ b/src/simdpackedselect.c
@@ -1,6 +1,7 @@
 /**
  * This code is released under a BSD License.
  */
+#ifdef __SSE4_1__
 #include "simdintegratedbitpacking.h"
 #include <smmintrin.h>
 
@@ -15486,4 +15487,4 @@ simdscand1(__m128i * initOffset, const __m128i *in, uint32_t bit)
    return ;
 }
 
-
+#endif
diff --git a/src/unit.c b/src/unit.c
index 8b12d87..6492791 100644
--- a/src/unit.c
+++ b/src/unit.c
@@ -130,6 +130,8 @@ int testset() {
 	return 0;
 }
 
+#ifdef __SSE4_1__
+
 int testsetd1() {
 	int bit;
 	size_t i;
@@ -175,7 +177,7 @@ int testsetd1() {
 
 	return 0;
 }
-
+#endif
 
 int testsetFOR() {
 	int bit;
@@ -317,6 +319,7 @@ int test() {
     return 0;
 }
 
+#ifdef __SSE4_1__
 int testFOR() {
     int N = 5000 * SIMDBlockSize, gap;
     __m128i * buffer = malloc(SIMDBlockSize * sizeof(uint32_t));
@@ -362,6 +365,7 @@ int testFOR() {
     printf("Code looks good.\n");
     return 0;
 }
+#endif
 
 #define MAX 300
 int test_simdmaxbitsd1_length() {
@@ -405,7 +409,7 @@ int uint32_cmp(const void *a, const void *b)
     return 0;
 }
 
-
+#ifdef __SSE4_1__
 int test_simdpackedsearch() {
     uint32_t buffer[128];
     uint32_t result = 0;
@@ -488,7 +492,6 @@ int test_simdpackedsearchFOR() {
     return 0;
 }
 
-
 int test_simdpackedsearch_advanced() {
     uint32_t buffer[128];
     uint32_t backbuffer[128];
@@ -655,6 +658,7 @@ int test_simdpackedselect_advanced() {
     printf("advanced simdselectd1: ok\n");
     return 0;
 }
+#endif
 
 
 int main() {
@@ -662,10 +666,12 @@ int main() {
     r =  testsetFOR();
     if (r)
          return r;
+
+#ifdef __SSE4_1__
     r =  testsetd1();
     if (r)
          return r;
-
+#endif
     r =  testset();
     if (r)
          return r;
@@ -679,7 +685,7 @@ int main() {
     r = testlongpack();
     if (r)
     	return r;
-
+#ifdef __SSE4_1__
     r = test_simdpackedsearchFOR();
     if (r)
         return r;
@@ -687,6 +693,7 @@ int main() {
     r = testFOR();
     if (r)
         return r;
+#endif 
     r = test();
     if (r)
         return r;
@@ -694,7 +701,7 @@ int main() {
     r = test_simdmaxbitsd1_length();
     if (r)
         return r;
-
+#ifdef __SSE4_1__
     r = test_simdpackedsearch();
     if (r)
         return r;
@@ -703,7 +710,6 @@ int main() {
     if (r)
         return r;
 
-
     r = test_simdpackedselect();
     if (r)
         return r;
@@ -711,6 +717,7 @@ int main() {
     r = test_simdpackedselect_advanced();
     if (r)
         return r;
+#endif
 
 
     return 0;