diff --git a/tests/host/sys/pgmspace.h b/tests/host/sys/pgmspace.h
index ef878eaaff..ac60cb15be 100644
--- a/tests/host/sys/pgmspace.h
+++ b/tests/host/sys/pgmspace.h
@@ -82,5 +82,6 @@ inline int vsnprintf_P(char* str, size_t size, const char* format, va_list ap)
 #define strncmp_P strncmp
 #define strncasecmp_P strncasecmp
 #define strcat_P strcat
+#define memcmp_P memcmp
 
 #endif