diff --git a/src/s_cpow.c b/src/s_cpow.c
index c1a4e59..044fe90 100644
--- a/src/s_cpow.c
+++ b/src/s_cpow.c
@@ -46,7 +46,7 @@
 
 #include <complex.h>
 #include <float.h>
-#include <math.h>
+#include <openlibm.h>
 
 double complex
 cpow(double complex a, double complex z)
diff --git a/src/s_cpowf.c b/src/s_cpowf.c
index 785f946..994fa06 100644
--- a/src/s_cpowf.c
+++ b/src/s_cpowf.c
@@ -45,7 +45,7 @@
  */
 
 #include <complex.h>
-#include <math.h>
+#include <openlibm.h>
 
 float complex
 cpowf(float complex a, float complex z)
diff --git a/src/s_cpowl.c b/src/s_cpowl.c
index 878c052..69d14d2 100644
--- a/src/s_cpowl.c
+++ b/src/s_cpowl.c
@@ -46,7 +46,7 @@
  */
 
 #include <complex.h>
-#include <math.h>
+#include <openlibm.h>
 
 long double complex
 cpowl(long double complex a, long double complex z)