diff --git a/src/fsk.c b/src/fsk.c
index 28b9c1d..28053b2 100644
--- a/src/fsk.c
+++ b/src/fsk.c
@@ -18,7 +18,7 @@
  */
 
 
-#include <malloc.h>
+#include <stdlib.h>
 #include <string.h>
 #include <math.h>	// fabs, hypotf
 #include <float.h>	// FLT_EPSILON
diff --git a/src/simple-tone-generator.c b/src/simple-tone-generator.c
index fe72872..4971786 100644
--- a/src/simple-tone-generator.c
+++ b/src/simple-tone-generator.c
@@ -20,7 +20,7 @@
 
 #include <math.h>
 #include <strings.h>
-#include <malloc.h>
+#include <stdlib.h>
 #include <assert.h>
 
 #include "simpleaudio.h"
diff --git a/src/simpleaudio-alsa.c b/src/simpleaudio-alsa.c
index 6e6e59d..1170ed8 100644
--- a/src/simpleaudio-alsa.c
+++ b/src/simpleaudio-alsa.c
@@ -24,7 +24,7 @@
 #if USE_ALSA
 
 #include <stdio.h>
-#include <malloc.h>
+#include <stdlib.h>
 #include <assert.h>
 
 #include <alsa/asoundlib.h>
diff --git a/src/simpleaudio-benchmark.c b/src/simpleaudio-benchmark.c
index 7571391..bde36f8 100644
--- a/src/simpleaudio-benchmark.c
+++ b/src/simpleaudio-benchmark.c
@@ -24,7 +24,7 @@
 #if USE_BENCHMARKS
 
 #include <stdio.h>
-#include <malloc.h>
+#include <stdlib.h>
 #include <string.h>
 #include <assert.h>
 
diff --git a/src/simpleaudio-pulse.c b/src/simpleaudio-pulse.c
index 93aacae..d759a9e 100644
--- a/src/simpleaudio-pulse.c
+++ b/src/simpleaudio-pulse.c
@@ -24,7 +24,7 @@
 #if USE_PULSEAUDIO
 
 #include <stdio.h>
-#include <malloc.h>
+#include <stdlib.h>
 #include <assert.h>
 
 #include <pulse/simple.h>
diff --git a/src/simpleaudio-sndfile.c b/src/simpleaudio-sndfile.c
index 8e52596..a4da348 100644
--- a/src/simpleaudio-sndfile.c
+++ b/src/simpleaudio-sndfile.c
@@ -25,7 +25,6 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <malloc.h>
 #include <string.h>
 #include <assert.h>
 
diff --git a/src/simpleaudio.c b/src/simpleaudio.c
index 4ee93df..ccbfc78 100644
--- a/src/simpleaudio.c
+++ b/src/simpleaudio.c
@@ -20,7 +20,7 @@
 #include "simpleaudio.h"
 #include "simpleaudio_internal.h"
 
-#include <malloc.h>
+#include <stdlib.h>
 #include <assert.h>
 #include <stdio.h>