diff --git a/js/src/jsapi-tests/Makefile.in b/js/src/jsapi-tests/Makefile.in
--- a/js/src/jsapi-tests/Makefile.in
+++ b/js/src/jsapi-tests/Makefile.in
@@ -57,17 +57,17 @@ CPPSRCS = \
   testDefineGetterSetterNonEnumerable.cpp \
   testExtendedEq.cpp \
   $(NULL)
 
 DEFINES         += -DEXPORT_JS_API
 
 LIBS      = $(NSPR_LIBS) $(DEPTH)/$(LIB_PREFIX)js_static.$(LIB_SUFFIX)
 
-LOCAL_INCLUDES += -I$(topsrcdir) -I..
+LOCAL_INCLUDES += -I$(topsrcdir) -I.. $(NSPR_CFLAGS)
 
 ifdef _MSC_VER
 ifdef WINCE
 WIN32_EXE_LDFLAGS += -ENTRY:mainACRTStartup
 endif
 endif
 
 include $(topsrcdir)/config/rules.mk