diff --git a/src/main.cpp b/src/main.cpp
index bde9d660..87f5256f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1146,6 +1146,32 @@ CBlockIndex* FindBlockByHeight(int nHeight)
     return vBlockIndexByHeight[nHeight];
 }
 
+bool WriteBlockToDisk(CBlock& block, CDiskBlockPos& pos)
+{
+    // Open history file to append
+    CAutoFile fileout = CAutoFile(OpenBlockFile(pos), SER_DISK, CLIENT_VERSION);
+    if (!fileout)
+        return error("WriteBlockToDisk() : OpenBlockFile failed");
+
+    // Write index header
+    unsigned int nSize = fileout.GetSerializeSize(block);
+    fileout << FLATDATA(Params().MessageStart()) << nSize;
+
+    // Write block
+    long fileOutPos = ftell(fileout);
+    if (fileOutPos < 0)
+        return error("WriteBlockToDisk() : ftell failed");
+    pos.nPos = (unsigned int)fileOutPos;
+    fileout << block;
+
+    // Flush stdio buffers and commit to disk before returning
+    fflush(fileout);
+    if (!IsInitialBlockDownload())
+        FileCommit(fileout);
+
+    return true;
+}
+
 bool CBlock::ReadFromDisk(const CBlockIndex* pindex)
 {
     if (!ReadFromDisk(pindex->GetBlockPos()))
diff --git a/src/main.h b/src/main.h
index bda775e8..a613613e 100644
--- a/src/main.h
+++ b/src/main.h
@@ -755,31 +755,7 @@ public:
 
 
 /** Functions for disk access for blocks */
-inline bool WriteBlockToDisk(CBlock& block, CDiskBlockPos& pos)
-{
-    // Open history file to append
-    CAutoFile fileout = CAutoFile(OpenBlockFile(pos), SER_DISK, CLIENT_VERSION);
-    if (!fileout)
-        return error("WriteBlockToDisk() : OpenBlockFile failed");
-
-    // Write index header
-    unsigned int nSize = fileout.GetSerializeSize(block);
-    fileout << FLATDATA(Params().MessageStart()) << nSize;
-
-    // Write block
-    long fileOutPos = ftell(fileout);
-    if (fileOutPos < 0)
-        return error("WriteBlockToDisk() : ftell failed");
-    pos.nPos = (unsigned int)fileOutPos;
-    fileout << block;
-
-    // Flush stdio buffers and commit to disk before returning
-    fflush(fileout);
-    if (!IsInitialBlockDownload())
-        FileCommit(fileout);
-
-    return true;
-}
+bool WriteBlockToDisk(CBlock& block, CDiskBlockPos& pos);