diff --git a/libgcc/Makefile.in b/libgcc/Makefile.in
index 1fe708a93f73..6e2a0470944f 100644
--- a/libgcc/Makefile.in
+++ b/libgcc/Makefile.in
@@ -310,7 +310,7 @@ CRTSTUFF_T_CFLAGS =
 MULTIDIR := $(shell $(CC) $(CFLAGS) -print-multi-directory)
 MULTIOSDIR := $(shell $(CC) $(CFLAGS) -print-multi-os-directory)
 
-MULTIOSSUBDIR := $(shell if test $(MULTIOSDIR) != .; then echo /$(MULTIOSDIR); fi)
+MULTIOSSUBDIR := $(shell if test "$(MULTIOSDIR)" != .; then echo /$(MULTIOSDIR); fi)
 inst_libdir = $(libsubdir)$(MULTISUBDIR)
 inst_slibdir = $(slibdir)$(MULTIOSSUBDIR)