diff --git a/FIXES b/FIXES
index 509f4ac..baa7ae5 100644
--- a/FIXES
+++ b/FIXES
@@ -25,6 +25,10 @@ THIS SOFTWARE.
 This file lists all bug fixes, changes, etc., made since the AWK book
 was sent to the printers in August, 1987.
 
+May 5, 2020:
+	Fix checks for compilers that can handle noreturn. Thanks to
+	GitHub user enh-google for pointing it out. Closes Issue #79.
+
 April 16, 2020:
 	Handle old compilers that don't support C11 (for noreturn).
 	Thanks to Arnold Robbins.
diff --git a/awk.h b/awk.h
index 36a4286..5a55301 100644
--- a/awk.h
+++ b/awk.h
@@ -25,7 +25,7 @@ THIS SOFTWARE.
 #include <assert.h>
 #include <stdint.h>
 #include <stdbool.h>
-#if __STDC__ <= 199901L
+#if __STDC_VERSION__ <= 199901L
 #define noreturn
 #else
 #include <stdnoreturn.h>
diff --git a/main.c b/main.c
index 6b1ed56..3b903f8 100644
--- a/main.c
+++ b/main.c
@@ -22,7 +22,7 @@ ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
 THIS SOFTWARE.
 ****************************************************************/
 
-const char	*version = "version 20200416";
+const char	*version = "version 20200515";
 
 #define DEBUG
 #include <stdio.h>