diff --git a/.travis.yml b/.travis.yml
index 10cd36a..81a0567 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,7 +18,7 @@ script:
     - date
     - export EXTRA_CFLAGS=""
     - echo ""
-    - bash test.sh version_check=1.2.3
+    - bash test.sh version_check=1.2.4
     - echo ""
     - if [ "$TRAVIS_OS_NAME" = "linux" ] ; then mkdir output ; bash make.sh ; ls output ; ls output | wc -l ; cd output ; bash ../test.sh ; cd .. ; rm -fr output; fi
     - echo ""
diff --git a/README.md b/README.md
index c80099c..6a0f46d 100644
--- a/README.md
+++ b/README.md
@@ -414,7 +414,7 @@ Destroy the `co`. The argument `co` must not be NULL. The private save stack wou
 ```c
 #define ACO_VERSION_MAJOR 1
 #define ACO_VERSION_MINOR 2
-#define ACO_VERSION_PATCH 3
+#define ACO_VERSION_PATCH 4
 ```
 
 These 3 macros are defined in the header `aco.h` and the value of them follows the spec: [Semantic Versioning 2.0.0](https://semver.org/spec/v2.0.0.html).
@@ -940,6 +940,9 @@ New ideas are welcome!
 # CHANGES
 
 ```
+v1.2.4 Sun Jul 29 2018
+    Changed `asm` to `__asm__` in aco.h to support compiler's `--std=c99`
+    flag (Issue #16, proposed by Theo Schlossnagle @postwait).
 v1.2.3 Thu Jul 26 2018
     Added support for MacOS;
     Added support for shared library build of libaco (PR #10, proposed
diff --git a/aco.h b/aco.h
index 9afc5be..97ea2ec 100644
--- a/aco.h
+++ b/aco.h
@@ -34,7 +34,7 @@ extern "C" {
 
 #define ACO_VERSION_MAJOR 1
 #define ACO_VERSION_MINOR 2
-#define ACO_VERSION_PATCH 3
+#define ACO_VERSION_PATCH 4
 
 #ifdef __i386__
     #define ACO_REG_IDX_RETADDR 0