diff --git a/src/math_special.cpp b/src/math_special.cpp
index bf11a1ad45..d4abc36f25 100644
--- a/src/math_special.cpp
+++ b/src/math_special.cpp
@@ -538,6 +538,8 @@ double MathSpecial::exp2_x86(double x)
 double MathSpecial::fm_exp(double x)
 {
 #if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+    if (x < -1022.0/FM_DOUBLE_LOG2OFE) return 0;
+    if (x > 1023.0/FM_DOUBLE_LOG2OFE) return INFINITY;
     return exp2_x86(FM_DOUBLE_LOG2OFE * x);
 #else
     return ::exp(x);