--- a/Eigen/src/Core/util/ConfigureVectorization.h
+++ b/Eigen/src/Core/util/ConfigureVectorization.h
@@ -342,7 +342,9 @@
       #if EIGEN_COMP_ICC >= 1110
         #include <immintrin.h>
       #else
+        #ifndef __EMSCRIPTEN__  // emscripten has no MMX header (its SSE emulation starts at xmmintrin.h)
         #include <mmintrin.h>
+        #endif
         #include <emmintrin.h>
         #include <xmmintrin.h>
         #ifdef  EIGEN_VECTORIZE_SSE3
--- a/Eigen/src/Core/arch/SSE/PacketMath.h
+++ b/Eigen/src/Core/arch/SSE/PacketMath.h
@@ -444,7 +444,7 @@
 template<> EIGEN_STRONG_INLINE Packet4i pcmp_le(const Packet4i& a, const Packet4i& b) { return por(pcmp_lt(a,b), pcmp_eq(a,b)); }
 
 template<> EIGEN_STRONG_INLINE Packet4f pmin<Packet4f>(const Packet4f& a, const Packet4f& b) {
-#if EIGEN_COMP_GNUC && EIGEN_COMP_GNUC < 63
+#if EIGEN_COMP_GNUC && EIGEN_COMP_GNUC < 63 && !defined(__EMSCRIPTEN__)
   // There appears to be a bug in GCC, by which the optimizer may
   // flip the argument order in calls to _mm_min_ps, so we have to
   // resort to inline ASM here. This is supposed to be fixed in gcc6.3,
@@ -463,7 +463,7 @@
 #endif
 }
 template<> EIGEN_STRONG_INLINE Packet2d pmin<Packet2d>(const Packet2d& a, const Packet2d& b) {
-#if EIGEN_COMP_GNUC && EIGEN_COMP_GNUC < 63
+#if EIGEN_COMP_GNUC && EIGEN_COMP_GNUC < 63 && !defined(__EMSCRIPTEN__)
   // There appears to be a bug in GCC, by which the optimizer may
   // flip the argument order in calls to _mm_min_pd, so we have to
   // resort to inline ASM here. This is supposed to be fixed in gcc6.3,
@@ -494,7 +494,7 @@
 
 
 template<> EIGEN_STRONG_INLINE Packet4f pmax<Packet4f>(const Packet4f& a, const Packet4f& b) {
-#if EIGEN_COMP_GNUC && EIGEN_COMP_GNUC < 63
+#if EIGEN_COMP_GNUC && EIGEN_COMP_GNUC < 63 && !defined(__EMSCRIPTEN__)
   // There appears to be a bug in GCC, by which the optimizer may
   // flip the argument order in calls to _mm_max_ps, so we have to
   // resort to inline ASM here. This is supposed to be fixed in gcc6.3,
@@ -513,7 +513,7 @@
 #endif
 }
 template<> EIGEN_STRONG_INLINE Packet2d pmax<Packet2d>(const Packet2d& a, const Packet2d& b) {
-#if EIGEN_COMP_GNUC && EIGEN_COMP_GNUC < 63
+#if EIGEN_COMP_GNUC && EIGEN_COMP_GNUC < 63 && !defined(__EMSCRIPTEN__)
   // There appears to be a bug in GCC, by which the optimizer may
   // flip the argument order in calls to _mm_max_pd, so we have to
   // resort to inline ASM here. This is supposed to be fixed in gcc6.3,