diff --git a/include/SDL3/SDL_begin_code.h b/include/SDL3/SDL_begin_code.h
index e577029073..f418c6109d 100644
--- a/include/SDL3/SDL_begin_code.h
+++ b/include/SDL3/SDL_begin_code.h
@@ -165,7 +165,7 @@
     (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202000L)
 #define SDL_FALLTHROUGH [[fallthrough]]
 #else
-#ifdef __has_attribute
+#if defined(__has_attribute) && !defined(__SUNPRO_C) && !defined(__SUNPRO_CC)
 #define SDL_HAS_FALLTHROUGH __has_attribute(__fallthrough__)
 #else
 #define SDL_HAS_FALLTHROUGH 0