diff --git a/science/opensph/Makefile b/science/opensph/Makefile
--- a/science/opensph/Makefile
+++ b/science/opensph/Makefile
@@ -1,6 +1,6 @@
 PORTNAME=	OpenSPH
 DISTVERSION=	0.4.1
-PORTREVISION=	3
+PORTREVISION=	4
 CATEGORIES=	science
 
 MAINTAINER=	yuri@FreeBSD.org
@@ -10,9 +10,11 @@
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-ONLY_FOR_ARCHS=	amd64 i386
+ONLY_FOR_ARCHS=	aarch64 amd64 i386
 ONLY_FOR_ARCHS_REASON=	unconditional use of -msse4.1 and inclusion of immintrin.h
 
+BUILD_DEPENDS_aarch64=	${LOCALBASE}/include/sse2neon.h:devel/sse2neon
+BUILD_DEPENDS+=	${BUILD_DEPENDS_${ARCH}}
 TEST_DEPENDS=	catch>0:devel/catch
 
 USES=		compiler:c++17-lang qmake qt:5
@@ -28,6 +30,8 @@
 QMAKE_ARGS=		CONFIG+=release
 
 CXXFLAGS+=	-DSPH_CONFIG_SET
+CXXFLAGS_amd64=	-msse4.1
+CXXFLAGS_i386=	-msse4.1
 
 TEST_WRKSRC=	${WRKDIR}/test
 
@@ -63,7 +67,7 @@
 				libtbb.so:devel/onetbb
 
 post-patch: # workaround for https://gitlab.com/sevecekp/sph/-/issues/48
-	@${FIND} ${WRKSRC} -name "*.pro" | ${XARGS} ${REINPLACE_CMD} -e 's|c++14|c++17|'
+	@${FIND} ${WRKSRC} -name "*.pro" | ${XARGS} ${REINPLACE_CMD} -e 's|c++14|c++17|' -e 's|-msse4.1||'
 
 do-test:
 	@${REINPLACE_CMD} -e 's|Path(.*|Path("${TEST_WRKSRC}");|' ${WRKSRC}/test/utils/Config.h
diff --git a/science/opensph/files/patch-core_objects_containers_BasicAllocators.h b/science/opensph/files/patch-core_objects_containers_BasicAllocators.h
new file mode 100644
--- /dev/null
+++ b/science/opensph/files/patch-core_objects_containers_BasicAllocators.h
@@ -0,0 +1,13 @@
+--- core/objects/containers/BasicAllocators.h.orig	2024-10-15 17:04:09 UTC
++++ core/objects/containers/BasicAllocators.h
+@@ -6,7 +6,9 @@
+ /// \date 2016-2021
+ 
+ #include "common/Assert.h"
+-#ifndef SPH_WIN
++#if defined(__arm__) || defined(__aarch64__)
++#include <sse2neon.h>
++#elif !defined(SPH_WIN)
+ #include <mm_malloc.h>
+ #else
+ #include <malloc.h>
diff --git a/science/opensph/files/patch-core_objects_geometry_Vector.h b/science/opensph/files/patch-core_objects_geometry_Vector.h
new file mode 100644
--- /dev/null
+++ b/science/opensph/files/patch-core_objects_geometry_Vector.h
@@ -0,0 +1,17 @@
+--- core/objects/geometry/Vector.h.orig	2024-10-15 17:00:09 UTC
++++ core/objects/geometry/Vector.h
+@@ -9,9 +9,13 @@
+ #include "objects/containers/Tuple.h"
+ #include "objects/geometry/Generic.h"
+ #include "objects/wrappers/Interval.h"
+-#include <immintrin.h>
+ #include <iomanip>
++#if defined(__arm__) || defined(__aarch64__)
++#include <sse2neon.h>
++#else
++#include <immintrin.h>
+ #include <smmintrin.h>
++#endif
+ 
+ NAMESPACE_SPH_BEGIN
+ 
diff --git a/science/opensph/files/patch-core_objects_wrappers_AlignedStorage.h b/science/opensph/files/patch-core_objects_wrappers_AlignedStorage.h
new file mode 100644
--- /dev/null
+++ b/science/opensph/files/patch-core_objects_wrappers_AlignedStorage.h
@@ -0,0 +1,13 @@
+--- core/objects/wrappers/AlignedStorage.h.orig	2024-10-15 17:05:35 UTC
++++ core/objects/wrappers/AlignedStorage.h
+@@ -7,7 +7,9 @@
+ 
+ #include "common/Assert.h"
+ #include "common/Traits.h"
+-#ifndef SPH_WIN
++#if defined(__arm__) || defined(__aarch64__)
++#include <sse2neon.h>
++#elif !defined(SPH_WIN)
+ #include <mm_malloc.h>
+ #else
+ #include <malloc.h>
diff --git a/science/opensph/files/patch-core_system_Platform.cpp b/science/opensph/files/patch-core_system_Platform.cpp
--- a/science/opensph/files/patch-core_system_Platform.cpp
+++ b/science/opensph/files/patch-core_system_Platform.cpp
@@ -1,6 +1,6 @@
---- core/system/Platform.cpp.orig	2021-04-08 21:23:28 UTC
+--- core/system/Platform.cpp.orig	2022-11-16 12:31:25 UTC
 +++ core/system/Platform.cpp
-@@ -102,14 +106,18 @@ class CpuUsage { (private)
+@@ -117,14 +117,18 @@ class CpuUsage { (public)
  
  public:
      CpuUsage() {
@@ -20,7 +20,7 @@
          file = fopen("/proc/cpuinfo", "r");
          numProcessors = 0;
          while (fgets(line, 128, file) != NULL) {
-@@ -117,6 +125,8 @@ class CpuUsage { (private)
+@@ -132,6 +136,8 @@ class CpuUsage { (public)
                  numProcessors++;
          }
          fclose(file);
@@ -29,7 +29,7 @@
      }
  
      Optional<Float> getUsage() {
-@@ -150,7 +160,7 @@ bool isDebuggerPresent() {
+@@ -176,7 +182,7 @@ bool isDebuggerPresent() {
      char buf[1024];
      bool debuggerPresent = false;