diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7bf0bb0c7..7b52e8853 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -92,7 +92,7 @@ find_program(PROTOBUF_COMPILER NAMES protoc)
 
 set(ENV{PKG_CONFIG_PATH} "$ENV{PKG_CONFIG_PATH}:/usr/local/lib/pkgconfig:/usr/local/lib64/pkgconfig:/usr/local/share/pkgconfig:/usr/lib64/pkgconfig")
 
-pkg_check_modules(JANSSON IMPORTED_TARGET REQUIRED jansson>=2.10)
+pkg_check_modules(JANSSON IMPORTED_TARGET REQUIRED jansson>=2.9)
 pkg_check_modules(LIBWEBSOCKETS IMPORTED_TARGET REQUIRED libwebsockets>=2.3.0)
 pkg_check_modules(PROTOBUF IMPORTED_TARGET protobuf>=2.6.0)
 pkg_check_modules(PROTOBUFC IMPORTED_TARGET libprotobuf-c>=1.1.0)
diff --git a/lib/api/sessions/socket.cpp b/lib/api/sessions/socket.cpp
index eeccdb325..dcefe7be7 100644
--- a/lib/api/sessions/socket.cpp
+++ b/lib/api/sessions/socket.cpp
@@ -22,6 +22,7 @@
 
 #include <sstream>
 
+#include <villas/compat.h>
 #include <villas/log.hpp>
 #include <villas/api/sessions/socket.hpp>
 
diff --git a/lib/nodes/uldaq.c b/lib/nodes/uldaq.c
index 238c5de21..2bc38301b 100644
--- a/lib/nodes/uldaq.c
+++ b/lib/nodes/uldaq.c
@@ -413,19 +413,15 @@ int uldaq_check(struct node *n)
 	Range ranges_se[num_ranges_se];
 
 	for (int i = 0; i < num_ranges_diff; i++) {
-		long long rng;
-
-		err = ulAIGetInfo(u->device_handle, AI_INFO_DIFF_RANGE, i, &rng);
-
-		ranges_diff[i] = *(Range *) rng;
+		err = ulAIGetInfo(u->device_handle, AI_INFO_DIFF_RANGE, i, (long long *) &ranges_diff[i]);
+		if (err != ERR_NO_ERROR)
+			return -1;
 	}
 
 	for (int i = 0; i < num_ranges_se; i++) {
-		long long rng;
-
-		err = ulAIGetInfo(u->device_handle, AI_INFO_SE_RANGE, i, &rng);
-
-		ranges_se[i] = *(Range *) rng;
+		err = ulAIGetInfo(u->device_handle, AI_INFO_SE_RANGE, i, (long long *) &ranges_se[i]);
+		if (err != ERR_NO_ERROR)
+			return -1;
 	}
 
 	if (!has_ai) {