diff --git a/src/random.cpp b/src/random.cpp
index 2a27e6ba0..bdfdb1adc 100644
--- a/src/random.cpp
+++ b/src/random.cpp
@@ -314,12 +314,16 @@ void GetOSRand(unsigned char *ent32)
     if (getentropy(ent32, NUM_OS_RANDOM_BYTES) != 0) {
         RandFailure();
     }
+    // Silence a compiler warning about unused function.
+    (void)GetDevURandom;
 #elif defined(HAVE_GETENTROPY_RAND) && defined(MAC_OSX)
     /* getentropy() is available on macOS 10.12 and later.
      */
     if (getentropy(ent32, NUM_OS_RANDOM_BYTES) != 0) {
         RandFailure();
     }
+    // Silence a compiler warning about unused function.
+    (void)GetDevURandom;
 #elif defined(HAVE_SYSCTL_ARND)
     /* FreeBSD, NetBSD and similar. It is possible for the call to return less
      * bytes than requested, so need to read in a loop.
@@ -333,6 +337,8 @@ void GetOSRand(unsigned char *ent32)
         }
         have += len;
     } while (have < NUM_OS_RANDOM_BYTES);
+    // Silence a compiler warning about unused function.
+    (void)GetDevURandom;
 #else
     /* Fall back to /dev/urandom if there is no specific method implemented to
      * get system entropy for this OS.