diff --git a/rtengine/cJSON.c b/rtengine/cJSON.c
index cf5ebef56..bf46c98c4 100644
--- a/rtengine/cJSON.c
+++ b/rtengine/cJSON.c
@@ -31,7 +31,6 @@
 #include <limits.h>
 #include <ctype.h>
 #include "cJSON.h"
-#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
 
 static const char *ep;
 
@@ -192,12 +191,21 @@ static const char *parse_string(cJSON *item,const char *str)
 
 					len=4;if (uc<0x80) len=1;else if (uc<0x800) len=2;else if (uc<0x10000) len=3; ptr2+=len;
 					
+#ifdef __GNUC__ // silence warning
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
+#endif
+
 					switch (len) {
 						case 4: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
 						case 3: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
 						case 2: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
 						case 1: *--ptr2 =(uc | firstByteMark[len]);
 					}
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
 					ptr2+=len;
 					break;
 				default:  *ptr2++=*ptr; break;