diff --git a/bfd/hosts/sparc-ll.h b/bfd/hosts/sparc-ll.h
index 78ad5db269..1f7c6952a8 100644
--- a/bfd/hosts/sparc-ll.h
+++ b/bfd/hosts/sparc-ll.h
@@ -9,6 +9,7 @@
 #include <ctype.h>
 #include <string.h>
 #include <sys/file.h>
+#include <alloca.h>
 #ifndef O_ACCMODE
 #define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
 #endif
diff --git a/bfd/hosts/sparc.h b/bfd/hosts/sparc.h
index 1239406dfd..3ae9af6961 100644
--- a/bfd/hosts/sparc.h
+++ b/bfd/hosts/sparc.h
@@ -6,6 +6,7 @@
 #include <ctype.h>
 #include <string.h>
 #include <sys/file.h>
+#include <alloca.h>
 #ifndef O_ACCMODE
 #define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
 #endif