diff --git a/src/coreclr/ilasm/asmman.cpp b/src/coreclr/ilasm/asmman.cpp
index 1f343066c5a36a..d63e8c4457d650 100644
--- a/src/coreclr/ilasm/asmman.cpp
+++ b/src/coreclr/ilasm/asmman.cpp
@@ -437,7 +437,7 @@ void    AsmMan::EndAssembly()
                     // Read the file into the buffer.
                     size_t dwBytesRead;
                     
-                    if ((dwBytesRead = fread(m_sStrongName.m_pbPublicKey, 1, m_sStrongName.m_cbPublicKey, fp)) <= m_sStrongName.m_cbPublicKey) {
+                    if ((dwBytesRead = fread(m_sStrongName.m_pbPublicKey, 1, m_sStrongName.m_cbPublicKey, fp)) < m_sStrongName.m_cbPublicKey) {
                         HRESULT hr = HRESULTFromErrno();
                         MAKE_UTF8PTR_FROMWIDE(keySourceNameUtf8, ((Assembler*)m_pAssembler)->m_wzKeySourceName);
                         report->error("Failed to read key file '%s': 0x%d\n",keySourceNameUtf8,hr);