diff --git a/include/amuse/BooBackend.hpp b/include/amuse/BooBackend.hpp
index 5eac4e9..21ddddc 100644
--- a/include/amuse/BooBackend.hpp
+++ b/include/amuse/BooBackend.hpp
@@ -9,6 +9,7 @@
 #include "IBackendVoiceAllocator.hpp"
 #include <mutex>
 #include <list>
+#include <unordered_map>
 
 namespace amuse {
 
diff --git a/lib/DSPCodec.cpp b/lib/DSPCodec.cpp
index 0277fa3..4060486 100644
--- a/lib/DSPCodec.cpp
+++ b/lib/DSPCodec.cpp
@@ -1,5 +1,6 @@
 #include "amuse/DSPCodec.hpp"
 #include <algorithm>
+#include <cmath>
 #include <memory.h>
 
 #if __SWITCH__
@@ -185,7 +186,7 @@ static bool AnalyzeRanges(tvec mtx[3], int* vecIdxsOut) {
 
   /* Get greatest distance from zero */
   for (int x = 1; x <= 2; x++) {
-    val = std::max(fabs(mtx[x][1]), fabs(mtx[x][2]));
+    val = std::max(std::fabs(mtx[x][1]), std::fabs(mtx[x][2]));
     if (val < DBL_EPSILON)
       return true;