diff --git a/configure b/configure
index d3528fbddb..f44df010a4 100755
--- a/configure
+++ b/configure
@@ -8799,7 +8799,7 @@ else
 fi
 done
 
-for ac_func in compress2 setsysinfo longjmp signal sigaction
+for ac_func in compress2 setsysinfo longjmp signal sigaction strdup
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
 echo "configure:8806: checking for $ac_func" >&5
diff --git a/configure.in b/configure.in
index 0e28e5034d..3d53bfcc66 100644
--- a/configure.in
+++ b/configure.in
@@ -1025,7 +1025,7 @@ dnl Check for functions.
 dnl
 AC_CHECK_FUNCS(getpwuid gethostname system getrusage fork waitpid)
 AC_CHECK_FUNCS(gettimeofday BSDgettimeofday difftime snprintf vsnprintf)
-AC_CHECK_FUNCS(compress2 setsysinfo longjmp signal sigaction)
+AC_CHECK_FUNCS(compress2 setsysinfo longjmp signal sigaction strdup)
 AC_TRY_COMPILE([#include<sys/types.h>],
 	       [off64_t n = 0;],
 	       AC_CHECK_FUNCS(lseek64 fseek64),