1 files changed, 1 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 1d823b2..e1b1431 100644
--- a/Makefile
+++ b/Makefile
@@ -44,6 +44,7 @@ ifeq ($(WANT_TEST),yes)
     TESTLDFLAGS := $(TESTLDFLAGS) \
 		$(shell $(PKGCONFIG) $(PKGCONFIGFLAGS) --libs json)
   else
+    TESTCFLAGS := $(TESTCFLAGS) -I$(PREFIX)/include/json
     TESTLDFLAGS := $(TESTLDFLAGS) -ljson
   endif