diff --git a/patches/intl-icu-70.1.patch b/patches/intl-icu-70.1.patch
new file mode 100644
index 0000000..3d5bb7d
--- /dev/null
+++ b/patches/intl-icu-70.1.patch
@@ -0,0 +1,45 @@
+From cd1447a6962496fca60a2f5e5d9cf4448575cc24 Mon Sep 17 00:00:00 2001
+From: Ben Ramsey <ramsey@php.net>
+Date: Tue, 19 Oct 2021 23:59:11 -0500
+Subject: [PATCH] Change UBool to bool for equality operators in ICU >= 70.1
+
+Refer to:
+- https://github.com/unicode-org/icu/commit/633438f8da99fee815e2c61626ea779a84567a3d
+- https://github.com/unicode-org/icu/commit/f6325d49ba57ec26f320b2865ce09ca47db458d9
+---
+ ext/intl/breakiterator/codepointiterator_internal.cpp | 4 ++++
+ ext/intl/breakiterator/codepointiterator_internal.h   | 4 ++++
+ 2 files changed, 8 insertions(+)
+
+diff --git a/ext/intl/breakiterator/codepointiterator_internal.cpp b/ext/intl/breakiterator/codepointiterator_internal.cpp
+index 71ba056994d0..3982a599af38 100644
+--- a/ext/intl/breakiterator/codepointiterator_internal.cpp
++++ b/ext/intl/breakiterator/codepointiterator_internal.cpp
+@@ -73,7 +73,11 @@ CodePointBreakIterator::~CodePointBreakIterator()
+ 	clearCurrentCharIter();
+ }
+ 
++#if U_ICU_VERSION_MAJOR_NUM >= 70
++bool CodePointBreakIterator::operator==(const BreakIterator& that) const
++#else
+ UBool CodePointBreakIterator::operator==(const BreakIterator& that) const
++#endif
+ {
+ 	if (typeid(*this) != typeid(that)) {
+ 		return false;
+diff --git a/ext/intl/breakiterator/codepointiterator_internal.h b/ext/intl/breakiterator/codepointiterator_internal.h
+index 43ec79d0b776..93b903a20bb8 100644
+--- a/ext/intl/breakiterator/codepointiterator_internal.h
++++ b/ext/intl/breakiterator/codepointiterator_internal.h
+@@ -37,7 +37,11 @@ namespace PHP {
+ 
+ 		virtual ~CodePointBreakIterator();
+ 
++#if U_ICU_VERSION_MAJOR_NUM >= 70
++		virtual bool operator==(const BreakIterator& that) const;
++#else
+ 		virtual UBool operator==(const BreakIterator& that) const;
++#endif
+ 
+ 		virtual CodePointBreakIterator* clone(void) const;
+ 
diff --git a/src/build-intl.sh b/src/build-intl.sh
index 0e4d024..bcd666e 100644
--- a/src/build-intl.sh
+++ b/src/build-intl.sh
@@ -41,10 +41,12 @@ install_icu() {
   sudo cp -r /usr/local/icu/lib/* /usr/lib/x86_64-linux-gnu/
 }
 install_intl() {
-  branch=$(get_branch)
   get_php
   (
-    cd "/tmp/php-src-$branch/ext/intl" || exit 1
+    for patch in patches/*.patch; do
+      patch -d /tmp/php-src -N -p1 -s < "$patch"
+    done
+    cd "/tmp/php-src/ext/intl" || exit 1    
     phpize && sudo ./configure --with-php-config="$(command -v php-config)" --enable-intl
     echo "#define FALSE 0" >> config.h
     echo "#define TRUE 1" >> config.h