diff --git a/external/paho_mqtt_c/CMakeLists.txt b/external/paho_mqtt_c/CMakeLists.txt
index 0c658f6..7fa9562 100644
--- a/external/paho_mqtt_c/CMakeLists.txt
+++ b/external/paho_mqtt_c/CMakeLists.txt
@@ -23,31 +23,36 @@ opendaq_dependency(
 if (paho_mqtt_c_FETCHED)
     
 
-    # Apply WIN32_LEAN_AND_MEAN to the Paho MQTT C library as well
-    if(WIN32)
-        # Add global compile definition to prevent inclusion of winsock.h and force winsock2.h
-        foreach(tgt
-            paho-mqtt3a
-            paho-mqtt3a-static
-            paho-mqtt3c
-            paho-mqtt3c-static
-            paho-mqtt3as
-            paho-mqtt3as-static
-            common_obj
-            common_ssl_obj
-            common_obj_static
-            common_ssl_obj_static
-        )
-            if(TARGET ${tgt})
+    foreach(tgt
+        paho-mqtt3a
+        paho-mqtt3a-static
+        paho-mqtt3c
+        paho-mqtt3c-static
+        paho-mqtt3as
+        paho-mqtt3as-static
+        common_obj
+        common_ssl_obj
+        common_obj_static
+        common_ssl_obj_static
+    )
+        if(TARGET ${tgt})
+            # Apply WIN32_LEAN_AND_MEAN to the Paho MQTT C library as well
+            if(WIN32)
+                # Add global compile definition to prevent inclusion of winsock.h and force winsock2.h
                 target_compile_definitions("${tgt}" PRIVATE _WINSOCKAPI_ NOMINMAX WIN32_LEAN_AND_MEAN)
-                if(MSVC)
-                    target_compile_options(${tgt} PRIVATE /WX- /W0)
-                endif()
             endif()
-        endforeach()
-        if(MSVC)
-            target_compile_options(Base64Test PRIVATE /WX- /W0)
-            target_compile_options(Sha1Test PRIVATE /WX- /W0)
+
+            # Don't let warnings in third-party Paho code fail the build (e.g. GCC 15 with
+            # glibc 2.43 reports discarded-qualifiers on strrchr() in MQTTProtocolOut.c)
+            if(MSVC)
+                target_compile_options(${tgt} PRIVATE /WX- /W0)
+            else()
+                target_compile_options(${tgt} PRIVATE -Wno-error)
+            endif()
         endif()
+    endforeach()
+    if(MSVC)
+        target_compile_options(Base64Test PRIVATE /WX- /W0)
+        target_compile_options(Sha1Test PRIVATE /WX- /W0)
     endif()
 endif()