diff --git a/dev-libs/icu/icu74-74.1.recipe b/dev-libs/icu/icu74-74.1.recipe
index 52247a831..1f02a9546 100644
--- a/dev-libs/icu/icu74-74.1.recipe
+++ b/dev-libs/icu/icu74-74.1.recipe
@@ -41,7 +41,7 @@ wrapping when displaying the text."
 HOMEPAGE="http://www.icu-project.org"
 COPYRIGHT="1995-2020 IBM Corporation and others."
 LICENSE="ICU"
-REVISION="3"
+REVISION="4"
 SOURCE_URI="https://github.com/unicode-org/icu/releases/download/release-${portVersion/\./-}/icu4c-${portVersion/\./_}-src.tgz"
 CHECKSUM_SHA256="86ce8e60681972e60e4dcb2490c697463fcec60dd400a5f9bffba26d0b52b8d0"
 SOURCE_URI_2="https://github.com/unicode-org/icu/releases/download/release-${portVersion/\./-}/icu4c-${portVersion/\./_}-data.zip#noarchive"
@@ -49,7 +49,7 @@ CHECKSUM_SHA256_2="67d5ab39c5187e1dd0fed60a3fe52794dce9784b4c045cb85e19f5d317fd7
 SOURCE_DIR="icu"
 PATCHES="icu74-$portVersion.patchset"
 
-ARCHITECTURES="?all !x86_gcc2 ?arm ?sparc ?arm64 ppc ?riscv64 x86_64"
+ARCHITECTURES="all !x86_gcc2"
 SECONDARY_ARCHITECTURES="x86"
 
 PROVIDES="
@@ -144,6 +144,12 @@ BUILD()
 
 	unzip -oq ../../../sources-2/icu4c-*-data.zip
 	rm -f data/in/icudt??l.dat
+
+	# optimize & make symbol lookups faster (and prevent symbols being overridden)
+	export CCFLAGS=-fno-semantic-interposition
+	export CXXFLAGS=-fno-semantic-interposition
+	export LDFLAGS=-Wl,-Bsymbolic-functions
+
 	autoconf
 	runConfigure ./configure \
 		--disable-samples --disable-extras --with-data-packaging=archive
diff --git a/dev-libs/icu/icu75-75.1.recipe b/dev-libs/icu/icu75-75.1.recipe
index 459b4e9b3..18c9ec7cd 100644
--- a/dev-libs/icu/icu75-75.1.recipe
+++ b/dev-libs/icu/icu75-75.1.recipe
@@ -49,7 +49,7 @@ CHECKSUM_SHA256_2="a5104212dc317a64f9b035723ea706f2f4fd5a0f37b7923fae7aeb9d1d006
 SOURCE_DIR="icu"
 PATCHES="icu75-$portVersion.patchset"
 
-ARCHITECTURES="?all !x86_gcc2 ?arm ?sparc ?arm64 ?riscv64 x86_64"
+ARCHITECTURES="?all !x86_gcc2"
 SECONDARY_ARCHITECTURES="x86"
 
 libVersion="$portVersion"
@@ -148,8 +148,14 @@ BUILD()
 	#rm -rf tools/tzcode/vanguard
 	#cp ../../../sources-3/tzdata*.tar.gz tools/tzcode/
 
+	# optimize & make symbol lookups faster (and prevent symbols being overridden)
+	export CCFLAGS=-fno-semantic-interposition
+	export CXXFLAGS=-fno-semantic-interposition
+	export LDFLAGS=-Wl,-Bsymbolic-functions
+
 	unzip -oq ../../../sources-2/icu4c-*-data.zip
 	rm -f data/in/icudt??l.dat
+
 	autoconf
 	runConfigure ./configure \
 		--disable-samples --disable-extras --with-data-packaging=archive