diff --git a/tommath.h b/tommath.h
index bcb9d86..6439a9d 100644
--- a/tommath.h
+++ b/tommath.h
@@ -21,7 +21,7 @@
 #include <ctype.h>
 #include <limits.h>
 
-#include <tommath_class.h>
+#include "tommath_class.h"
 
 #undef MIN
 #define MIN(x,y) ((x)<(y)?(x):(y))
diff --git a/tommath_class.h b/tommath_class.h
index 9faf627..a9ae034 100644
--- a/tommath_class.h
+++ b/tommath_class.h
@@ -987,8 +987,8 @@
 #ifdef LTM3
 #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