diff --git a/programs/Makefile b/programs/Makefile
index d379ddf..c88a6c7 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -16,6 +16,8 @@
 
 ifdef USE_CRYPTO_SUBMODULE
 LOCAL_LDFLAGS += -L../crypto/library
+LOCAL_CFLAGS += -I../crypto/include
+LOCAL_CXXFLAGS += -I../crypto/include
 endif
 
 ifndef SHARED
diff --git a/tests/Makefile b/tests/Makefile
index 4118c14..78670c3 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -14,6 +14,7 @@
 
 ifdef USE_CRYPTO_SUBMODULE
 LOCAL_LDFLAGS += -L../crypto/library
+LOCAL_CFLAGS += -I../crypto/include
 CRYPTO := ../crypto/library/
 else
 CRYPTO := ../library/