diff --git a/lang/eisl/Makefile b/lang/eisl/Makefile
index c2648632b04b..9731d31d81b5 100644
--- a/lang/eisl/Makefile
+++ b/lang/eisl/Makefile
@@ -1,49 +1,49 @@
 PORTNAME=	eisl
 DISTVERSIONPREFIX=	v
-DISTVERSION=	3.72
+DISTVERSION=	3.90
 CATEGORIES=	lang devel
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Interpreter and compiler compatible with ISLisp standard
 WWW=		https://github.com/sasagawa888/eisl
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/license.txt
 
 BROKEN_armv7=	stage breaks: Abort trap (likely due to the memory allocation problem)
 BROKEN_i386=	stage breaks: data segment of more than 500GB is required, see https://github.com/sasagawa888/eisl/issues/218
 
 TEST_DEPENDS=	cppcheck:devel/cppcheck
 
 USES=		gmake gl localbase:ldflags ncurses:port tcl # port because tests need ncurses6-config
 USE_GL=		gl glu glut
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	sasagawa888
 
 ALL_TARGET=	${PORTNAME}
 TEST_TARGET=	check # tests print some errors and warnings, see https://github.com/sasagawa888/eisl/issues/181#issuecomment-1195147029
 
 MAKEFILE=	makefile
 
 CFLAGS+=	-D__BSD_VISIBLE # w/out this there's error: use of undeclared identifier '_SC_NPROCESSORS_CONF'
 CFLAGS+=	-I${TCL_INCLUDEDIR}
 LDFLAGS+=	-lncursesw
 
 .include <bsd.port.options.mk>
 
 .if ${ARCH} == riscv64
 EXTRA_PATCHES=	${FILESDIR}/extra-patch-makefile
 .endif
 
 .include <bsd.port.pre.mk>
 
 .if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400079 || ( ${OSVERSION} >= 1302505 && ${OSVERSION} < 1400000 ))
 CFLAGS+=	-Wno-error=int-conversion
 .endif
 
 .if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400092 || ( ${OSVERSION} >= 1302507 && ${OSVERSION} < 1400000 ))
 CFLAGS+=	-Wno-error=incompatible-function-pointer-types
 .endif
 
 .include <bsd.port.post.mk>
diff --git a/lang/eisl/distinfo b/lang/eisl/distinfo
index 0787494e6cd5..da448ce991ef 100644
--- a/lang/eisl/distinfo
+++ b/lang/eisl/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1712132295
-SHA256 (sasagawa888-eisl-v3.72_GH0.tar.gz) = cb38e0fe3e6efd8e429bc6855e3db8812ccd087f9b1280df08bb80d32c5368ba
-SIZE (sasagawa888-eisl-v3.72_GH0.tar.gz) = 2430755
+TIMESTAMP = 1714460842
+SHA256 (sasagawa888-eisl-v3.90_GH0.tar.gz) = bcc7b5541897334a13f70ab5e789b6acd22af7c1366ac0f0d6769669a604f2cc
+SIZE (sasagawa888-eisl-v3.90_GH0.tar.gz) = 2435398
diff --git a/lang/eisl/files/patch-ffi.h b/lang/eisl/files/patch-ffi.h
new file mode 100644
index 000000000000..efd446611808
--- /dev/null
+++ b/lang/eisl/files/patch-ffi.h
@@ -0,0 +1,11 @@
+--- ffi.h.orig	2024-04-30 07:10:18 UTC
++++ ffi.h
+@@ -4,7 +4,7 @@
+ 
+ #ifndef FFI_H
+ #define FFI_H
+-#define CELLSIZE 20000000
++#define CELLSIZE 10000000
+ // TCC does not have support for "static conts" as compile time constant
+ #ifdef __TINYC__
+ #define NIL 0