diff --git a/configure.ac b/configure.ac
index efe5473ab0..bfc55fa89e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1122,6 +1122,8 @@ elif test "$ac_cv_sizeof_long" = "8"; then
     case "$host" in
         *pc-solaris2*)
         ;;
+	sparc-*-solaris2*)
+	;;
         *-solaris2*|*apple-darwin*|*-openbsd*)
 	    if test "$ac_cv_sizeof_long_long" = "8"; then
 	        int64_t_fmt='#define SWITCH_INT64_T_FMT "lld"'
diff --git a/src/include/switch_platform.h b/src/include/switch_platform.h
index 933c4d3688..962bf972b3 100644
--- a/src/include/switch_platform.h
+++ b/src/include/switch_platform.h
@@ -279,7 +279,7 @@ typedef intptr_t switch_ssize_t;
 
 #endif
 
-#if defined(__sun__) && defined(__x86_64)
+#if defined(__sun__) && (defined(__x86_64) || defined(__arch64__))
 #define SWITCH_TIME_T_FMT SWITCH_SIZE_T_FMT
 #else
 #define SWITCH_TIME_T_FMT SWITCH_INT64_T_FMT