diff --git a/app-text/poppler/poppler-26.01.0.ebuild b/app-text/poppler/poppler-26.01.0.ebuild
index b06a28783f134..df1affdf44ac6 100644
--- a/app-text/poppler/poppler-26.01.0.ebuild
+++ b/app-text/poppler/poppler-26.01.0.ebuild
@@ -98,6 +98,10 @@ src_configure() {
 	xdg_environment_reset
 	append-lfs-flags # bug #898506
 
+	# giscanner is called if cairo and introspection are enabled.
+	# In that case, PKG_CONFIG must be defined.
+	tc-export PKG_CONFIG
+
 	local mycmakeargs=(
 		-DBUILD_GTK_TESTS=OFF
 		-DBUILD_QT5_TESTS=OFF
diff --git a/app-text/poppler/poppler-9999.ebuild b/app-text/poppler/poppler-9999.ebuild
index 1f544780d6813..7d03e1bb41d0d 100644
--- a/app-text/poppler/poppler-9999.ebuild
+++ b/app-text/poppler/poppler-9999.ebuild
@@ -97,6 +97,10 @@ src_configure() {
 	xdg_environment_reset
 	append-lfs-flags # bug #898506
 
+	# giscanner is called if cairo and introspection are enabled.
+	# In that case, PKG_CONFIG must be defined.
+	tc-export PKG_CONFIG
+
 	local mycmakeargs=(
 		-DBUILD_GTK_TESTS=OFF
 		-DBUILD_QT5_TESTS=OFF