diff --git a/src/print_disk_info.c b/src/print_disk_info.c
index 4c23c7a..d8cce1c 100644
--- a/src/print_disk_info.c
+++ b/src/print_disk_info.c
@@ -84,12 +84,15 @@ static bool below_threshold(struct statvfs buf, const char *prefix_type, const c
             case 'T':
             case 't':
                 factor *= base;
+                /* fall-through */
             case 'G':
             case 'g':
                 factor *= base;
+                /* fall-through */
             case 'M':
             case 'm':
                 factor *= base;
+                /* fall-through */
             case 'K':
             case 'k':
                 factor *= base;
diff --git a/src/print_mem.c b/src/print_mem.c
index 941c9d9..4a521d7 100644
--- a/src/print_mem.c
+++ b/src/print_mem.c
@@ -62,12 +62,15 @@ static unsigned long memory_absolute(const char *mem_amount, const unsigned long
         case 'T':
         case 't':
             amount *= BINARY_BASE;
+            /* fall-through */
         case 'G':
         case 'g':
             amount *= BINARY_BASE;
+            /* fall-through */
         case 'M':
         case 'm':
             amount *= BINARY_BASE;
+            /* fall-through */
         case 'K':
         case 'k':
             amount *= BINARY_BASE;