diff --git a/dev-python/psycopg/psycopg-3.1.19.ebuild b/dev-python/psycopg/psycopg-3.1.19.ebuild
index d1c0ba870de9c..15b4a76bbc7ee 100644
--- a/dev-python/psycopg/psycopg-3.1.19.ebuild
+++ b/dev-python/psycopg/psycopg-3.1.19.ebuild
@@ -7,7 +7,7 @@ DISTUTILS_EXT=1
 DISTUTILS_USE_PEP517=setuptools
 PYTHON_COMPAT=( pypy3 python3_{10..13} )
 
-inherit distutils-r1
+inherit distutils-r1 flag-o-matic
 
 DESCRIPTION="PostgreSQL database adapter for Python"
 HOMEPAGE="
@@ -52,6 +52,14 @@ BDEPEND="
 distutils_enable_tests pytest
 
 python_compile() {
+	# -Werror=strict-aliasing
+	# https://bugs.gentoo.org/935401
+	# https://github.com/psycopg/psycopg/issues/867
+	#
+	# Do not trust with LTO either.
+	append-flags -fno-strict-aliasing
+	filter-lto
+
 	# Python code + ctypes backend
 	cd psycopg || die
 	distutils-r1_python_compile
diff --git a/dev-python/psycopg/psycopg-3.2.0.ebuild b/dev-python/psycopg/psycopg-3.2.0.ebuild
index 1bcf3b3ac2e03..d62b5590fa54a 100644
--- a/dev-python/psycopg/psycopg-3.2.0.ebuild
+++ b/dev-python/psycopg/psycopg-3.2.0.ebuild
@@ -7,7 +7,7 @@ DISTUTILS_EXT=1
 DISTUTILS_USE_PEP517=setuptools
 PYTHON_COMPAT=( pypy3 python3_{10..13} )
 
-inherit distutils-r1
+inherit distutils-r1 flag-o-matic
 
 DESCRIPTION="PostgreSQL database adapter for Python"
 HOMEPAGE="
@@ -54,6 +54,14 @@ BDEPEND="
 distutils_enable_tests pytest
 
 python_compile() {
+	# -Werror=strict-aliasing
+	# https://bugs.gentoo.org/935401
+	# https://github.com/psycopg/psycopg/issues/867
+	#
+	# Do not trust with LTO either.
+	append-flags -fno-strict-aliasing
+	filter-lto
+
 	# Python code + ctypes backend
 	cd psycopg || die
 	distutils-r1_python_compile
diff --git a/dev-python/psycopg/psycopg-3.2.1.ebuild b/dev-python/psycopg/psycopg-3.2.1.ebuild
index 1bcf3b3ac2e03..d62b5590fa54a 100644
--- a/dev-python/psycopg/psycopg-3.2.1.ebuild
+++ b/dev-python/psycopg/psycopg-3.2.1.ebuild
@@ -7,7 +7,7 @@ DISTUTILS_EXT=1
 DISTUTILS_USE_PEP517=setuptools
 PYTHON_COMPAT=( pypy3 python3_{10..13} )
 
-inherit distutils-r1
+inherit distutils-r1 flag-o-matic
 
 DESCRIPTION="PostgreSQL database adapter for Python"
 HOMEPAGE="
@@ -54,6 +54,14 @@ BDEPEND="
 distutils_enable_tests pytest
 
 python_compile() {
+	# -Werror=strict-aliasing
+	# https://bugs.gentoo.org/935401
+	# https://github.com/psycopg/psycopg/issues/867
+	#
+	# Do not trust with LTO either.
+	append-flags -fno-strict-aliasing
+	filter-lto
+
 	# Python code + ctypes backend
 	cd psycopg || die
 	distutils-r1_python_compile