diff --git a/sys-devel/dwz/dwz-0.15-r1.ebuild b/sys-devel/dwz/dwz-0.15-r1.ebuild
index 6ea8c380f942b..2b489208a1869 100644
--- a/sys-devel/dwz/dwz-0.15-r1.ebuild
+++ b/sys-devel/dwz/dwz-0.15-r1.ebuild
@@ -41,6 +41,8 @@ src_prepare() {
 }
 
 src_compile() {
+	export LANG=C LC_ALL=C  # grep find nothing for non-ascii locales
+
 	emake CFLAGS="${CFLAGS}" srcdir="${S}"
 }
 
diff --git a/sys-devel/dwz/dwz-0.15-r4.ebuild b/sys-devel/dwz/dwz-0.15-r4.ebuild
index 1fa3a4e115ac3..aff95634ad3bd 100644
--- a/sys-devel/dwz/dwz-0.15-r4.ebuild
+++ b/sys-devel/dwz/dwz-0.15-r4.ebuild
@@ -52,6 +52,8 @@ src_prepare() {
 }
 
 src_compile() {
+	export LANG=C LC_ALL=C  # grep find nothing for non-ascii locales
+
 	tc-export PKG_CONFIG
 
 	export LIBS="-lelf"
diff --git a/sys-devel/dwz/dwz-9999.ebuild b/sys-devel/dwz/dwz-9999.ebuild
index 8e0c26c75f093..7692569e9bcad 100644
--- a/sys-devel/dwz/dwz-9999.ebuild
+++ b/sys-devel/dwz/dwz-9999.ebuild
@@ -41,6 +41,8 @@ src_prepare() {
 }
 
 src_compile() {
+	export LANG=C LC_ALL=C  # grep find nothing for non-ascii locales
+
 	emake CFLAGS="${CFLAGS}" srcdir="${S}"
 }