diff --git a/Modules/about-distro/src/Module.cpp b/Modules/about-distro/src/Module.cpp
--- a/Modules/about-distro/src/Module.cpp
+++ b/Modules/about-distro/src/Module.cpp
@@ -41,6 +41,8 @@
 
 #ifdef Q_OS_LINUX
 #include <sys/sysinfo.h>
+#elif defined(Q_OS_FREEBSD)
+#include <unistd.h>
 #endif
 #include <sys/utsname.h>
 
@@ -55,6 +57,8 @@
     if (sysinfo(&info) == 0)
         // manpage "sizes are given as multiples of mem_unit bytes"
         ret = info.totalram * info.mem_unit;
+#elif defined(Q_OS_FREEBSD)
+    ret = (size_t)sysconf(_SC_PHYS_PAGES) * (size_t)sysconf(_SC_PAGESIZE);
 #endif
     return ret;
 }