diff --git a/src/encoders/omx/formatters.c b/src/encoders/omx/formatters.c
index b16f3d6..fea7004 100644
--- a/src/encoders/omx/formatters.c
+++ b/src/encoders/omx/formatters.c
@@ -35,9 +35,9 @@
 	case _value: { return #_value; }
 
 #define CASE_ASSERT(_msg, _value) default: { \
-		char *_buf; A_CALLOC(_buf, 128); \
-		sprintf(_buf, _msg ": 0x%08x", _value); \
-		assert(0 && _buf); \
+		char *_assert_buf; A_CALLOC(_assert_buf, 128); \
+		sprintf(_assert_buf, _msg ": 0x%08x", _value); \
+		assert(0 && _assert_buf); \
 	}
 
 const char *omx_error_to_string(OMX_ERRORTYPE error) {
diff --git a/src/threading.h b/src/threading.h
index c850729..4ce2953 100644
--- a/src/threading.h
+++ b/src/threading.h
@@ -51,9 +51,9 @@
 
 #ifdef WITH_PTHREAD_NP
 #	define A_THREAD_RENAME(_fmt, ...) { \
-			char _buf[MAX_THREAD_NAME] = {0}; \
-			assert(snprintf(_buf, MAX_THREAD_NAME, _fmt, ##__VA_ARGS__) > 0); \
-			thread_set_name(_buf); \
+			char _new_tname_buf[MAX_THREAD_NAME] = {0}; \
+			assert(snprintf(_new_tname_buf, MAX_THREAD_NAME, _fmt, ##__VA_ARGS__) > 0); \
+			thread_set_name(_new_tname_buf); \
 		}
 #else
 #	define A_THREAD_RENAME(_fmt, ...)