diff --git a/src/lib/b64_decode.c b/src/lib/b64_decode.c
index 85f43c0..696652c 100644
--- a/src/lib/b64_decode.c
+++ b/src/lib/b64_decode.c
@@ -84,10 +84,10 @@
 		  uint8_t *output_data)
 {
 	struct buffer_descriptor bd;
-	unsigned interim = 0;
+	unsigned int interim = 0;
 	size_t output_size = 0;
 	/* count of processed input bits, modulo log2(64) */
-	unsigned bit_count = 0;
+	unsigned int bit_count = 0;
 
 	/*
 	 * Keep the context on the stack to make things easier if this needs