diff --git a/Tests/Integration/GNUmakefile.preamble b/Tests/Integration/GNUmakefile.preamble
index 4f707043a..3173c8993 100644
--- a/Tests/Integration/GNUmakefile.preamble
+++ b/Tests/Integration/GNUmakefile.preamble
@@ -13,6 +13,6 @@ ADDITIONAL_LIB_DIRS += \
 	-L../../SoObjects/SOGo/SOGo.framework/Versions/Current/sogo -lSOGo \
 	-L../../SOPE/GDLContentStore/$(GNUSTEP_OBJ_DIR)/ -lGDLContentStore \
 	-L../../SOPE/NGCards/$(GNUSTEP_OBJ_DIR)/ -lNGCards \
-        -L/usr/local/lib/sogo -L/usr/lib/sogo -lEOControl -lNGStreams -lNGMime -lNGExtensions
+        -L/usr/local/lib/sogo -L/usr/lib/sogo -L/usr/lib64/sogo -lEOControl -lNGStreams -lNGMime -lNGExtensions
 
 ADDITIONAL_LDFLAGS += -Wl,--no-as-needed