diff --git a/src/IGBheader.h b/src/IGBheader.h
index 1deb647b9807b0ad9135d4fc752dbeac1e3587c0..a2a9c9304279409785322a612e2aac723371b7ed 100644
--- a/src/IGBheader.h
+++ b/src/IGBheader.h
@@ -5,6 +5,10 @@
 #include <zlib.h>
 #include <cstring>
 #include <assert.h>
+#include <cmath>
+#include <cstdio>
+#include <fstream>
+#include <cctype>
 #include <float.h>
 #include <limits>
 #include <algorithm>