diff --git a/tools/audiofile/audiofile.cpp b/tools/audiofile/audiofile.cpp
index 163237b5..c2ba0f04 100644
--- a/tools/audiofile/audiofile.cpp
+++ b/tools/audiofile/audiofile.cpp
@@ -11183,7 +11183,11 @@ status WAVEFile::parseFormat(const Tag &id, uint32_t size)
 
 			/* numCoefficients should be at least 7. */
 			assert(numCoefficients >= 7 && numCoefficients <= 255);
-
+			if (numCoefficients < 7 || numCoefficients > 255)
+			{
+				_af_error(AF_BAD_HEADER, "Bad number of coefficients");
+				return AF_FAIL;
+			}
 			m_msadpcmNumCoefficients = numCoefficients;
 
 			for (int i=0; i<m_msadpcmNumCoefficients; i++)