diff --git a/libfdisk/src/gpt.c b/libfdisk/src/gpt.c
index 233bf8aa7..96221affe 100644
--- a/libfdisk/src/gpt.c
+++ b/libfdisk/src/gpt.c
@@ -2712,7 +2712,7 @@ int fdisk_gpt_set_npartitions(struct fdisk_context *cxt, uint32_t nents)
 	struct fdisk_gpt_label *gpt;
 	size_t new_size;
 	uint32_t old_nents;
-	uint64_t first_usable, last_usable;
+	uint64_t first_usable, last_usable = 0ULL;
 	int rc;
 
 	assert(cxt);
diff --git a/sys-utils/unshare.c b/sys-utils/unshare.c
index 7005acfc4..ed2eb31e8 100644
--- a/sys-utils/unshare.c
+++ b/sys-utils/unshare.c
@@ -667,7 +667,7 @@ int main(int argc, char *argv[])
 			.pid = 0,
 		};
 
-		struct __user_cap_data_struct payload[_LINUX_CAPABILITY_U32S_3] = { 0 };
+		struct __user_cap_data_struct payload[_LINUX_CAPABILITY_U32S_3] = {{ 0 }};
 		int cap;
 		uint64_t effective;