diff --git a/CCache/snprintf.c b/CCache/snprintf.c
index 32187c1a5..9bf8a817b 100644
--- a/CCache/snprintf.c
+++ b/CCache/snprintf.c
@@ -292,6 +292,7 @@ static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args
 				break;
 			case 'X':
 				flags |= DP_F_UP;
+				/* FALLTHROUGH */
 			case 'x':
 				flags |= DP_F_UNSIGNED;
 				if (cflags == DP_C_SHORT)
@@ -314,6 +315,7 @@ static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args
 				break;
 			case 'E':
 				flags |= DP_F_UP;
+				/* FALLTHROUGH */
 			case 'e':
 				if (cflags == DP_C_LDOUBLE)
 					fvalue = va_arg (args, LDOUBLE);
@@ -322,6 +324,7 @@ static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args
 				break;
 			case 'G':
 				flags |= DP_F_UP;
+				/* FALLTHROUGH */
 			case 'g':
 				if (cflags == DP_C_LDOUBLE)
 					fvalue = va_arg (args, LDOUBLE);