https://github.com/rsyslog/rsyslog/commit/d9475f133e3c79875a7c4ccd92038b7123c1f155
https://github.com/rsyslog/rsyslog/commit/468eeb79b8da91fb71dfef6bfb25476b2a37f446
https://github.com/rsyslog/rsyslog/commit/50205ced0fc22e74f26f2a07b557b69c5d30e168

--- a/grammar/rainerscript.c
+++ b/grammar/rainerscript.c
@@ -1935,6 +1935,7 @@ num2ipv4(struct svar *__restrict__ const sourceVal) {
 	return(estr);
 }
 
+#ifdef HAVE_LIBCURL
 /* curl callback for doFunc_http_request */
 static size_t
 curlResult(void *ptr, size_t size, size_t nmemb, void *userdata)
@@ -2010,6 +2011,7 @@ doFunc_http_request(struct cnffunc *__restrict__ const func,
 	}
 	RETiRet;
 }
+#endif
 
 static int ATTR_NONNULL(1,3,4)
 doFunc_is_time(const char *__restrict__ const str,
@@ -2513,11 +2515,16 @@ doFuncCall(struct cnffunc *__restrict__ const func, struct svar *__restrict__ co
 		if(bMustFree2) free(str2);
 		break;
 	case CNFFUNC_HTTP_REQUEST:
+#ifdef HAVE_LIBCURL
 		cnfexprEval(func->expr[0], &r[0], usrptr, pWti);
 		str = (char*) var2CString(&r[0], &bMustFree);
 		doFunc_http_request(func, ret, str);
 		if(bMustFree) free(str);
 		varFreeMembers(&r[0]);
+#else
+		LogError(0, RS_RET_INTERNAL_ERROR,
+			"rainerscript: internal error: HTTP_Fetch not supported, not built with libcurl support");
+#endif
 		break;
 	default:
 		if(Debug) {

--- a/configure.ac
+++ b/configure.ac
@@ -454,6 +454,8 @@ if test "$enable_libcurl" = "yes"; then
 	)
 fi
 
+AM_CONDITIONAL(ENABLE_LIBCURL, test "x${enable_libcurl}" = "xyes")
+
 # klog
 AC_ARG_ENABLE(klog,
         [AS_HELP_STRING([--enable-klog],[Integrated klog functionality @<:@default=yes@:>@])],

--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -226,7 +226,6 @@ TESTS +=  \
 	rscript_contains.sh \
 	rscript_bare_var_root.sh \
 	rscript_bare_var_root-empty.sh \
-	rscript_http_request.sh \
 	rscript_ipv42num.sh \
 	rscript_field.sh \
 	rscript_stop.sh \
@@ -305,7 +304,11 @@ TESTS +=  \
 	lookup_table_rscript_reload.sh \
 	lookup_table_rscript_reload_without_stub.sh \
 	multiple_lookup_tables.sh
-endif
+if ENABLE_LIBCURL
+TESTS +=  \
+	rscript_http_request.sh
+endif # ENABLE_LIBCURL
+endif # ENABLE_TESTBENCH2
 
 if HAVE_VALGRIND
 TESTS +=  \
@@ -313,7 +316,6 @@ TESTS +=  \
 	mmexternal-InvldProg-vg.sh \
 	internal-errmsg-memleak-vg.sh \
 	rscript_set_memleak-vg.sh \
-	rscript_http_request-vg.sh \
 	no-parser-vg.sh \
 	discard-rptdmsg-vg.sh \
 	discard-allmark-vg.sh \
@@ -338,6 +340,10 @@ TESTS +=  \
 	multiple_lookup_tables-vg.sh \
 	fac_local0-vg.sh \
 	rscript_trim-vg.sh
+if ENABLE_LIBCURL
+TESTS +=  \
+	rscript_http_request-vg.sh
+endif # ENABLE_LIBCURL
 endif # HAVE_VALGRIND
 
 if ENABLE_ROOT_TESTS

--- a/grammar/Makefile.am
+++ b/grammar/Makefile.am
@@ -12,8 +12,11 @@ libgrammar_la_SOURCES = \
 	parserif.h \
 	grammar.h
 libgrammar_la_CPPFLAGS =  $(RSRT_CFLAGS) $(LIBLOGGING_STDLOG_CFLAGS)
-#libgrammar_la_LIBADD = $(CURL_LIBS) $(RSRT_LIBS) $(SOL_LIBS)
-libgrammar_la_LIBADD = $(CURL_LIBS)
+libgrammar_la_LIBADD =
+if ENABLE_LIBCURL
+libgrammar_la_CPPFLAGS += $(CURL_CFLAGS)
+libgrammar_la_LIBADD += $(CURL_LIBS)
+endif
 
 #testdriver_SOURCES = testdriver.c libgrammar.la
 #testdriver_CPPFLAGS =  $(RSRT_CFLAGS)

--- a/plugins/omelasticsearch/Makefile.am
+++ b/plugins/omelasticsearch/Makefile.am
@@ -1,7 +1,7 @@
 pkglib_LTLIBRARIES = omelasticsearch.la
 
 omelasticsearch_la_SOURCES = omelasticsearch.c
-omelasticsearch_la_CPPFLAGS =  $(RSRT_CFLAGS) $(PTHREADS_CFLAGS)
+omelasticsearch_la_CPPFLAGS = $(RSRT_CFLAGS) $(PTHREADS_CFLAGS) $(CURL_CFLAGS)
 omelasticsearch_la_LDFLAGS = -module -avoid-version
 omelasticsearch_la_LIBADD =  $(CURL_LIBS) $(LIBM)