diff --git a/core/tremor/codebook.c b/core/tremor/codebook.c
index d055870..96a8e6f 100644
--- a/core/tremor/codebook.c
+++ b/core/tremor/codebook.c
@@ -15,6 +15,7 @@
 
  ********************************************************************/
 
+#include <alloca.h>
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
diff --git a/core/tremor/floor0.c b/core/tremor/floor0.c
index bdb83b8..d4b35b8 100644
--- a/core/tremor/floor0.c
+++ b/core/tremor/floor0.c
@@ -15,6 +15,7 @@
 
  ********************************************************************/
 
+#include <alloca.h>
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
diff --git a/core/tremor/info.c b/core/tremor/info.c
index 200e5f9..d5375f0 100644
--- a/core/tremor/info.c
+++ b/core/tremor/info.c
@@ -18,6 +18,7 @@
 /* general handling of the header and the vorbis_info structure (and
    substructures) */
 
+#include <alloca.h>
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
diff --git a/core/tremor/mapping0.c b/core/tremor/mapping0.c
index 38d1405..09a43a3 100644
--- a/core/tremor/mapping0.c
+++ b/core/tremor/mapping0.c
@@ -15,6 +15,7 @@
 
  ********************************************************************/
 
+#include <alloca.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/core/tremor/res012.c b/core/tremor/res012.c
index 224b54e..b569a75 100644
--- a/core/tremor/res012.c
+++ b/core/tremor/res012.c
@@ -15,6 +15,7 @@
 
  ********************************************************************/
 
+#include <alloca.h>
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
diff --git a/core/tremor/sharedbook.c b/core/tremor/sharedbook.c
index 3fd379d..287c4ce 100644
--- a/core/tremor/sharedbook.c
+++ b/core/tremor/sharedbook.c
@@ -15,6 +15,7 @@
 
  ********************************************************************/
 
+#include <alloca.h>
 #include <stdlib.h>
 #include <math.h>
 #include <string.h>