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-rw-r--r--ext/standard/php_math.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/standard/php_math.h b/ext/standard/php_math.h
index 77ee5363df..e4127322c3 100644
--- a/ext/standard/php_math.h
+++ b/ext/standard/php_math.h
@@ -67,6 +67,7 @@ PHP_FUNCTION(number_format);
PHP_FUNCTION(deg2rad);
PHP_FUNCTION(rad2deg);
+#include <math.h>
#ifndef M_E
#define M_E 2.7182818284590452354 /* e */