diff --git a/src/include/86box/plat.h b/src/include/86box/plat.h
index 02e5def3b..2b0809c2e 100644
--- a/src/include/86box/plat.h
+++ b/src/include/86box/plat.h
@@ -55,7 +55,7 @@ extern int strnicmp(const char *s1, const char *s2, size_t n);
 #    define off64_t  off_t
 #endif
 
-#if !defined (__APPLE__) || !defined(__clang__)
+#if !defined (__APPLE__) && !defined(__clang__)
 #    define FALLTHROUGH_ANNOTATION
 #endif
 
diff --git a/src/include/86box/plat_fallthrough.h b/src/include/86box/plat_fallthrough.h
index 702321344..212d662fe 100644
--- a/src/include/86box/plat_fallthrough.h
+++ b/src/include/86box/plat_fallthrough.h
@@ -18,7 +18,7 @@
 #ifndef EMU_PLAT_FALLTHROUGH_H
 #define EMU_PLAT_FALLTHROUGH_H
 
-#if !defined (__APPLE__) || !defined(__clang__)
+#if !defined (__APPLE__) && !defined(__clang__)
 #    define FALLTHROUGH_ANNOTATION
 #endif