diff --git a/build/curl/build.sh b/build/curl/build.sh
index 6b434ccbfd..23bb7a8fb1 100755
--- a/build/curl/build.sh
+++ b/build/curl/build.sh
@@ -58,6 +58,7 @@ CC+=" $CTF_CFLAGS"
 init
 download_source $PROG $PROG $VER
 patch_source
+run_autoreconf -i
 prep_build autoconf -oot
 build -multi
 run_testsuite
diff --git a/build/curl/patches/ldap.patch b/build/curl/patches/ldap.patch
new file mode 100644
index 0000000000..fc0c36fdee
--- /dev/null
+++ b/build/curl/patches/ldap.patch
@@ -0,0 +1,28 @@
+
+OmniOS does not have an `ldap.pc` file for pkg-config to find so don't add it
+to the private requirements list in `libcurl.pc`
+
+Reverts upstream https://github.com/curl/curl/pull/15163
+
+diff -wpruN --no-dereference '--exclude=*.orig' a~/CMakeLists.txt a/CMakeLists.txt
+--- a~/CMakeLists.txt	1970-01-01 00:00:00
++++ a/CMakeLists.txt	1970-01-01 00:00:00
+@@ -1042,7 +1042,6 @@ if(NOT CURL_DISABLE_LDAP)
+       list(APPEND CMAKE_REQUIRED_DEFINITIONS "-DLDAP_DEPRECATED=1")
+       list(APPEND CMAKE_REQUIRED_LIBRARIES ${LDAP_LIBRARY})
+       set(CURL_LIBS "${LDAP_LIBRARY};${CURL_LIBS}")
+-      set(LIBCURL_PC_REQUIRES_PRIVATE "ldap;${LIBCURL_PC_REQUIRES_PRIVATE}")
+       if(HAVE_LIBLBER)
+         list(APPEND CMAKE_REQUIRED_LIBRARIES ${LDAP_LBER_LIBRARY})
+         set(CURL_LIBS "${LDAP_LBER_LIBRARY};${CURL_LIBS}")
+diff -wpruN --no-dereference '--exclude=*.orig' a~/acinclude.m4 a/acinclude.m4
+--- a~/acinclude.m4	1970-01-01 00:00:00
++++ a/acinclude.m4	1970-01-01 00:00:00
+@@ -565,7 +565,6 @@ AC_DEFUN([CURL_CHECK_LIBS_LDAP], [
+       else
+         LIBS="$curl_cv_ldap_LIBS $curl_cv_save_LIBS"
+       fi
+-      LIBCURL_PC_REQUIRES_PRIVATE="ldap $LIBCURL_PC_REQUIRES_PRIVATE"
+       AC_MSG_RESULT([$curl_cv_ldap_LIBS])
+       ;;
+   esac
diff --git a/build/curl/patches/series b/build/curl/patches/series
index 6726658d8d..37cb3c13cc 100644
--- a/build/curl/patches/series
+++ b/build/curl/patches/series
@@ -1 +1,2 @@
 tests.patch
+ldap.patch