diff --git a/tommath.h b/tommath.h
index 04274eb..258da57 100644
--- a/tommath.h
+++ b/tommath.h
@@ -18,7 +18,7 @@
 #include <stdint.h>
 #include <limits.h>
 
-#include <tommath_class.h>
+#include "tommath_class.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/tommath_class.h b/tommath_class.h
index d9d0e72..6885e23 100644
--- a/tommath_class.h
+++ b/tommath_class.h
@@ -1121,8 +1121,8 @@
 #   define LTM_LAST
 #endif
 
-#include <tommath_superclass.h>
-#include <tommath_class.h>
+#include "tommath_superclass.h"
+#include "tommath_class.h"
 #else
 #   define LTM_LAST
 #endif