diff --git a/kernel/power/isamax.c b/kernel/power/isamax.c
index 6f2f70ae9..0dd002d6b 100644
--- a/kernel/power/isamax.c
+++ b/kernel/power/isamax.c
@@ -1,4 +1,4 @@
-#if ( defined(__GNUC__)  && __GNUC__   < 6 )
+#if ( defined(__GNUC__) && (__GNUC__   < 5 || (__GNUC__ == 7 && __GNUC_MINOR__ < 3)) )
 #pragma GCC optimize "O0"
 #endif
 /***************************************************************************