diff --git a/src/include/86box/bswap.h b/src/include/86box/bswap.h
index b943dd2d8..95be57e61 100644
--- a/src/include/86box/bswap.h
+++ b/src/include/86box/bswap.h
@@ -73,6 +73,7 @@
     )
 #endif    /*HAVE_BYTESWAP_H*/
 
+#if  __GNUC__ >= 10
 #if defined __has_builtin && __has_builtin(__builtin_bswap16)
 #define bswap16(x) __builtin_bswap16(x)
 #else
@@ -81,7 +82,14 @@ static __inline uint16_t bswap16(uint16_t x)
     return bswap_16(x);
 }
 #endif
+#else
+static __inline uint16_t bswap16(uint16_t x)
+{
+    return bswap_16(x);
+}
+#endif
 
+#if  __GNUC__ >= 10
 #if defined __has_builtin && __has_builtin(__builtin_bswap32)
 #define bswap32(x) __builtin_bswap32(x)
 #else
@@ -90,7 +98,14 @@ static __inline uint32_t bswap32(uint32_t x)
     return bswap_32(x);
 }
 #endif
+#else
+static __inline uint32_t bswap32(uint32_t x)
+{
+    return bswap_32(x);
+}
+#endif
 
+#if  __GNUC__ >= 10
 #if defined __has_builtin && __has_builtin(__builtin_bswap64)
 #define bswap64(x) __builtin_bswap64(x)
 #else
@@ -99,6 +114,12 @@ static __inline uint64_t bswap64(uint64_t x)
     return bswap_64(x);
 }
 #endif
+#else
+static __inline uint64_t bswap64(uint64_t x)
+{
+    return bswap_64(x);
+}
+#endif
 
 static __inline void bswap16s(uint16_t *s)
 {