diff --git a/src/random.cpp b/src/random.cpp
index fee378f715..1f2e650af3 100644
--- a/src/random.cpp
+++ b/src/random.cpp
@@ -245,6 +245,8 @@ 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)
     // We need a fallback for OSX < 10.12
     if (&getentropy != nullptr) {
@@ -254,6 +256,8 @@ void GetOSRand(unsigned char *ent32)
     } else {
         GetDevURandom(ent32);
     }
+    // Silence a compiler warning about unused function.
+    (void)GetDevURandom;
 #elif defined(HAVE_SYSCTL_ARND)
     /* FreeBSD and similar. It is possible for the call to return less
      * bytes than requested, so need to read in a loop.
@@ -267,6 +271,8 @@ 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.