diff --git a/debian/rules b/debian/rules
index 9f57dcd10..4fb395fe0 100755
--- a/debian/rules
+++ b/debian/rules
@@ -24,7 +24,6 @@ override_dh_auto_configure:
 		-DUSE_GSSAPI:BOOL=ON \
 		-DTHREADSAFE:BOOL=ON \
 		-DBUILD_CLAR:BOOL=ON \
-		-DREGEX_BACKEND=pcre2 \
 		-DUSE_NTLMCLIENT=OFF \
 		-DUSE_HTTP_PARSER=system \
 		-DLIB_INSTALL_DIR:STRING=lib/$(DEB_HOST_MULTIARCH)
@@ -38,7 +37,6 @@ override_dh_auto_configure:
 		-DUSE_GSSAPI:BOOL=ON \
 		-DBUILD_CLAR:BOOL=OFF \
 		-DBUILD_SHARED_LIBS:BOOL=OFF \
-		-DREGEX_BACKEND=pcre2 \
 		-DUSE_NTLMCLIENT=OFF \
 		-DUSE_HTTP_PARSER=system \
 		-DLIB_INSTALL_DIR:STRING=lib/$(DEB_HOST_MULTIARCH)