diff --git a/make/common/shared/Platform.gmk b/make/common/shared/Platform.gmk
index 91326a9f79484674027e63009ae37c50de9c2e4c..5a4ced18d3bcca971058301bf1de144d9a068bc2 100644
--- a/make/common/shared/Platform.gmk
+++ b/make/common/shared/Platform.gmk
@@ -148,7 +148,7 @@ ifeq ($(SYSTEM_UNAME), SunOS)
   # Suffix for file bundles used in previous release
   BUNDLE_FILE_SUFFIX=.tar
   # How much RAM does this machine have:
-  MB_OF_MEMORY=$(shell /etc/prtconf | fgrep 'Memory size:' | expand | cut -d' ' -f3)
+  MB_OF_MEMORY=$(shell /usr/sbin/prtconf | fgrep 'Memory size:' | expand | cut -d' ' -f3)
 endif
 
 # Platform settings specific to Linux