diff -Naur qpdf-7.1.0-orig/configure.ac qpdf-7.1.0/configure.ac
--- qpdf-7.1.0-orig/configure.ac	2018-01-15 04:09:20.000000000 +0300
+++ qpdf-7.1.0/configure.ac	2018-01-15 09:20:00.149735600 +0300
@@ -122,7 +122,7 @@
 
 if test "x$qpdf_OS_SECURE_RANDOM" = "x1"; then
   OLIBS=$LIBS
-  LIBS="$LIBS Advapi32.lib"
+  LIBS="$LIBS -ladvapi32"
   AC_MSG_CHECKING(for Advapi32 library)
   AC_LINK_IFELSE([AC_LANG_PROGRAM(
     [[#pragma comment(lib, "crypt32.lib")
@@ -132,7 +132,7 @@
      [CryptAcquireContext(&cp, NULL, NULL, PROV_RSA_FULL, 0);]
      )],
      [AC_MSG_RESULT(yes)
-      LIBS="$OLIBS -lAdvapi32"],
+      LIBS="$OLIBS -ladvapi32"],
      [AC_MSG_RESULT(no)
       LIBS=$OLIBS])
 fi