diff --git a/src/include/switch_platform.h b/src/include/switch_platform.h
index 501dfbab31..5a64af81ed 100644
--- a/src/include/switch_platform.h
+++ b/src/include/switch_platform.h
@@ -253,8 +253,12 @@ typedef intptr_t switch_ssize_t;
 #endif
 
 #ifndef SWITCH_INT64_T_FMT
+#ifdef __sun
+#define SWITCH_INT64_T_FMT          "ld"
+#else
 #define SWITCH_INT64_T_FMT          (sizeof (long) == 8 ? "ld" : "lld")
 #endif
+#endif
 
 #ifndef SWITCH_UINT64_T_FMT
 #define SWITCH_UINT64_T_FMT         (sizeof (long) == 8 ? "lu" : "llu")